Initial version of MQTT sink

Merge branch 'develop' of github.com:ClusterCockpit/cc-metric-collector into develop
Remove stray error check
2025-07-19 11:21:41 +02:00 · 2024-04-19 17:30:18 +02:00 · 2024-04-10 19:57:54 +02:00 · 2024-04-10 19:57:46 +02:00 · 2024-03-06 15:14:44 +01:00 · 2024-03-06 14:59:47 +01:00
69 changed files with 3775 additions and 2318 deletions
--- a/.github/workflows/Release.yml
+++ b/.github/workflows/Release.yml
@@ -8,16 +8,17 @@ on:
 push:
  tags:
  - '**'
+ workflow_dispatch:

 jobs:

  #
-  # Build on AlmaLinux 8.5 using go-toolset
+  # Build on AlmaLinux 8 using go-toolset
  #
  AlmaLinux-RPM-build:
    runs-on: ubuntu-latest
    # See: https://hub.docker.com/_/almalinux
-    container: almalinux:8.5
+    container: almalinux:8
    # The job outputs link to the outputs of the 'rpmrename' step
    # Only job outputs can be used in child jobs
    outputs:
@@ -35,7 +36,7 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
      with:
        submodules: recursive
        fetch-depth: 0
@@ -43,28 +44,30 @@ jobs:
    # Use dnf to install build dependencies
    - name: Install build dependencies
      run: |
-          wget -q http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm \
-                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-bin-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm \
-                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-src-1.18.2-1.module_el8.7.0+1173+5d37c0fd.noarch.rpm \
-                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/go-toolset-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm
-          rpm -i go*.rpm
+          dnf --assumeyes install \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-bin-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-src-1.21.7-1.module_el8+960+4060efbe.noarch.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/go-toolset-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm

    - name: RPM build MetricCollector
      id: rpmbuild
-      run: make RPM
+      run: |
+          git config --global --add safe.directory /__w/cc-metric-collector/cc-metric-collector
+          make RPM

-    # AlmaLinux 8.5 is a derivate of RedHat Enterprise Linux 8 (UBI8),
+    # AlmaLinux 8 is a derivate of RedHat Enterprise Linux 8 (UBI8),
    # so the created RPM both contain the substring 'el8' in the RPM file names
-    # This step replaces the substring 'el8' to 'alma85'. It uses the move operation
-    # because it is unclear whether the default AlmaLinux 8.5 container contains the 
+    # This step replaces the substring 'el8' to 'alma8'. It uses the move operation
+    # because it is unclear whether the default AlmaLinux 8 container contains the
    # 'rename' command. This way we also get the new names for output.
-    - name: Rename RPMs (s/el8/alma85/)
+    - name: Rename RPMs (s/el8/alma8/)
      id: rpmrename
      run: |
        OLD_RPM="${{steps.rpmbuild.outputs.RPM}}"
        OLD_SRPM="${{steps.rpmbuild.outputs.SRPM}}"
-        NEW_RPM="${OLD_RPM/el8/alma85}"
-        NEW_SRPM=${OLD_SRPM/el8/alma85}
+        NEW_RPM="${OLD_RPM/el8/alma8}"
+        NEW_SRPM=${OLD_SRPM/el8/alma8}
        mv "${OLD_RPM}" "${NEW_RPM}"
        mv "${OLD_SRPM}" "${NEW_SRPM}"
        echo "::set-output name=SRPM::${NEW_SRPM}"
@@ -74,12 +77,12 @@ jobs:
    - name: Save RPM as artifact
      uses: actions/upload-artifact@v2
      with:
-        name: cc-metric-collector RPM for AlmaLinux 8.5
+        name: cc-metric-collector RPM for AlmaLinux 8
        path: ${{ steps.rpmrename.outputs.RPM }}
    - name: Save SRPM as artifact
      uses: actions/upload-artifact@v2
      with:
-        name: cc-metric-collector SRPM for AlmaLinux 8.5
+        name: cc-metric-collector SRPM for AlmaLinux 8
        path: ${{ steps.rpmrename.outputs.SRPM }}

  #
@@ -87,8 +90,8 @@ jobs:
  #
  UBI-8-RPM-build:
    runs-on: ubuntu-latest
-    # See: https://catalog.redhat.com/software/containers/ubi8/ubi/5c359854d70cc534b3a3784e?container-tabs=gti
-    container: registry.access.redhat.com/ubi8/ubi:8.5-226.1645809065
+    # See: https://catalog.redhat.com/software/containers/ubi8/ubi/5c35984d70cc534b3a3784e?container-tabs=gti
+    container: registry.access.redhat.com/ubi8/ubi:8.8-1032.1692772289
    # The job outputs link to the outputs of the 'rpmbuild' step
    outputs:
      rpm : ${{steps.rpmbuild.outputs.RPM}}
@@ -103,7 +106,7 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
      with:
        submodules: recursive
        fetch-depth: 0
@@ -111,15 +114,17 @@ jobs:
    # Use dnf to install build dependencies
    - name: Install build dependencies
      run: |
-          wget -q http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm \
-                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-bin-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm \
-                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-src-1.18.2-1.module_el8.7.0+1173+5d37c0fd.noarch.rpm \
-                  http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/go-toolset-1.18.2-1.module_el8.7.0+1173+5d37c0fd.x86_64.rpm
-          rpm -i go*.rpm
+          dnf --assumeyes --disableplugin=subscription-manager install \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-bin-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-src-1.21.7-1.module_el8+960+4060efbe.noarch.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/go-toolset-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm

    - name: RPM build MetricCollector
      id: rpmbuild
-      run: make RPM
+      run: |
+          git config --global --add safe.directory /__w/cc-metric-collector/cc-metric-collector
+          make RPM

    # See: https://github.com/actions/upload-artifact
    - name: Save RPM as artifact
@@ -134,11 +139,11 @@ jobs:
        path: ${{ steps.rpmbuild.outputs.SRPM }}

  #
-  # Build on Ubuntu 20.04 using official go package
+  # Build on Ubuntu 22.04 using official go package
  #
-  Ubuntu-focal-build:
+  Ubuntu-jammy-build:
    runs-on: ubuntu-latest
-    container: ubuntu:20.04
+    container: ubuntu:22.04
    # The job outputs link to the outputs of the 'debrename' step
    # Only job outputs can be used in child jobs
    outputs:
@@ -153,34 +158,35 @@ jobs:
    # fetch-depth must be 0 to use git describe
    # See: https://github.com/marketplace/actions/checkout
    - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
      with:
        submodules: recursive
        fetch-depth: 0
    # Use official golang package
    - name: Install Golang
      run: |
-          wget -q https://go.dev/dl/go1.19.1.linux-amd64.tar.gz
-          tar -C /usr/local -xzf go1.19.1.linux-amd64.tar.gz
+          wget -q https://go.dev/dl/go1.21.1.linux-amd64.tar.gz --output-document=- | \
+          tar --directory=/usr/local --extract --gzip
          export PATH=/usr/local/go/bin:/usr/local/go/pkg/tool/linux_amd64:$PATH
          go version
    - name: DEB build MetricCollector
      id: dpkg-build
      run: |
          export PATH=/usr/local/go/bin:/usr/local/go/pkg/tool/linux_amd64:$PATH
+          git config --global --add safe.directory /__w/cc-metric-collector/cc-metric-collector
          make DEB
-    - name: Rename DEB (add '_ubuntu20.04')
+    - name: Rename DEB (add '_ubuntu22.04')
      id: debrename
      run: |
        OLD_DEB_NAME=$(echo "${{steps.dpkg-build.outputs.DEB}}" | rev | cut -d '.' -f 2- | rev)
-        NEW_DEB_FILE="${OLD_DEB_NAME}_ubuntu20.04.deb"
+        NEW_DEB_FILE="${OLD_DEB_NAME}_ubuntu22.04.deb"
        mv "${{steps.dpkg-build.outputs.DEB}}" "${NEW_DEB_FILE}"
        echo "::set-output name=DEB::${NEW_DEB_FILE}"
    # See: https://github.com/actions/upload-artifact
    - name: Save DEB as artifact
      uses: actions/upload-artifact@v2
      with:
-        name: cc-metric-collector DEB for Ubuntu 20.04
+        name: cc-metric-collector DEB for Ubuntu 22.04
        path: ${{ steps.debrename.outputs.DEB }}

  #
@@ -193,15 +199,15 @@ jobs:

    steps:
    # See: https://github.com/actions/download-artifact
-    - name: Download AlmaLinux 8.5 RPM
+    - name: Download AlmaLinux 8 RPM
      uses: actions/download-artifact@v2
      with:
-        name: cc-metric-collector RPM for AlmaLinux 8.5
-    - name: Download AlmaLinux 8.5 SRPM
+        name: cc-metric-collector RPM for AlmaLinux 8
+    - name: Download AlmaLinux 8 SRPM
      uses: actions/download-artifact@v2
      with:
-        name: cc-metric-collector SRPM for AlmaLinux 8.5
-    
+        name: cc-metric-collector SRPM for AlmaLinux 8
+
    - name: Download UBI 8 RPM
      uses: actions/download-artifact@v2
      with:
@@ -211,10 +217,10 @@ jobs:
      with:
        name: cc-metric-collector SRPM for UBI 8

-    - name: Download Ubuntu 20.04 DEB
+    - name: Download Ubuntu 22.04 DEB
      uses: actions/download-artifact@v2
      with:
-        name: cc-metric-collector DEB for Ubuntu 20.04
+        name: cc-metric-collector DEB for Ubuntu 22.04

    # The download actions do not publish the name of the downloaded file,
    # so we re-use the job outputs of the parent jobs. The files are all
@@ -225,18 +231,18 @@ jobs:
    - name: Set RPM variables
      id: files
      run: |
-        ALMA_85_RPM=$(basename "${{ needs.AlmaLinux-RPM-build.outputs.rpm}}")
-        ALMA_85_SRPM=$(basename "${{ needs.AlmaLinux-RPM-build.outputs.srpm}}")
+        ALMA_8_RPM=$(basename "${{ needs.AlmaLinux-RPM-build.outputs.rpm}}")
+        ALMA_8_SRPM=$(basename "${{ needs.AlmaLinux-RPM-build.outputs.srpm}}")
        UBI_8_RPM=$(basename "${{ needs.UBI-8-RPM-build.outputs.rpm}}")
        UBI_8_SRPM=$(basename "${{ needs.UBI-8-RPM-build.outputs.srpm}}")
        U_2004_DEB=$(basename "${{ needs.Ubuntu-focal-build.outputs.deb}}")
-        echo "ALMA_85_RPM::${ALMA_85_RPM}"
-        echo "ALMA_85_SRPM::${ALMA_85_SRPM}"
+        echo "ALMA_8_RPM::${ALMA_8_RPM}"
+        echo "ALMA_8_SRPM::${ALMA_8_SRPM}"
        echo "UBI_8_RPM::${UBI_8_RPM}"
        echo "UBI_8_SRPM::${UBI_8_SRPM}"
        echo "U_2004_DEB::${U_2004_DEB}"
-        echo "::set-output name=ALMA_85_RPM::${ALMA_85_RPM}"
-        echo "::set-output name=ALMA_85_SRPM::${ALMA_85_SRPM}"
+        echo "::set-output name=ALMA_8_RPM::${ALMA_8_RPM}"
+        echo "::set-output name=ALMA_8_SRPM::${ALMA_8_SRPM}"
        echo "::set-output name=UBI_8_RPM::${UBI_8_RPM}"
        echo "::set-output name=UBI_8_SRPM::${UBI_8_SRPM}"
        echo "::set-output name=U_2004_DEB::${U_2004_DEB}"
@@ -248,8 +254,8 @@ jobs:
      with:
        name: cc-metric-collector-${{github.ref_name}}
        files: |
-         ${{ steps.files.outputs.ALMA_85_RPM }}
-         ${{ steps.files.outputs.ALMA_85_SRPM }}
+         ${{ steps.files.outputs.ALMA_8_RPM }}
+         ${{ steps.files.outputs.ALMA_8_SRPM }}
         ${{ steps.files.outputs.UBI_8_RPM }}
         ${{ steps.files.outputs.UBI_8_SRPM }}
         ${{ steps.files.outputs.U_2004_DEB }}
--- a/.github/workflows/runonce.yml
+++ b/.github/workflows/runonce.yml
@@ -4,28 +4,31 @@
 name: Run Test

 # Run on event push
-on: push
+on:
+  push:
+  workflow_dispatch:

 jobs:
+
  #
-  # Job build-1-18
-  # Build on latest Ubuntu using golang version 1.18
+  # Job build-1-21
+  # Build on latest Ubuntu using golang version 1.21
  #
-  build-1-18:
+  build-1-21:
    runs-on: ubuntu-latest
    steps:
    # See: https://github.com/marketplace/actions/checkout
    # Checkout git repository and submodules
    - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
      with:
        submodules: recursive

    # See: https://github.com/marketplace/actions/setup-go-environment
    - name: Setup Golang
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v4
      with:
-        go-version: '1.18.2'
+        go-version: '1.21'

    - name: Build MetricCollector
      run: make
@@ -34,27 +37,141 @@ jobs:
      run: ./cc-metric-collector --once --config .github/ci-config.json

  #
-  # Job build-1-19
-  # Build on latest Ubuntu using golang version 1.19
+  # Job build-1-22
+  # Build on latest Ubuntu using golang version 1.22
  #
-  build-1-19:
+  build-1-22:
    runs-on: ubuntu-latest
    steps:
    # See: https://github.com/marketplace/actions/checkout
    # Checkout git repository and submodules
    - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
      with:
        submodules: recursive

    # See: https://github.com/marketplace/actions/setup-go-environment
    - name: Setup Golang
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v4
      with:
-        go-version: '1.19'
+        go-version: '1.22'

    - name: Build MetricCollector
      run: make

    - name: Run MetricCollector once
      run: ./cc-metric-collector --once --config .github/ci-config.json
+
+  #
+  # Build on AlmaLinux 8 using go-toolset
+  #
+  AlmaLinux-RPM-build:
+    runs-on: ubuntu-latest
+    # See: https://hub.docker.com/_/almalinux
+    container: almalinux:8
+    # The job outputs link to the outputs of the 'rpmrename' step
+    # Only job outputs can be used in child jobs
+    steps:
+
+    # Use dnf to install development packages
+    - name: Install development packages
+      run: |
+          dnf --assumeyes group install "Development Tools" "RPM Development Tools"
+          dnf --assumeyes install wget openssl-devel diffutils delve which
+
+    # Checkout git repository and submodules
+    # fetch-depth must be 0 to use git describe
+    # See: https://github.com/marketplace/actions/checkout
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+        fetch-depth: 0
+
+    # Use dnf to install build dependencies
+    - name: Install build dependencies
+      run: |
+          dnf --assumeyes install \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-bin-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-src-1.21.7-1.module_el8+960+4060efbe.noarch.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/go-toolset-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm
+
+    - name: RPM build MetricCollector
+      id: rpmbuild
+      run: |
+          git config --global --add safe.directory /__w/cc-metric-collector/cc-metric-collector
+          make RPM
+
+  #
+  # Build on UBI 8 using go-toolset
+  #
+  UBI-8-RPM-build:
+    runs-on: ubuntu-latest
+    # See: https://catalog.redhat.com/software/containers/ubi8/ubi/5c359854d70cc534b3a3784e?container-tabs=gti
+    container: registry.access.redhat.com/ubi8/ubi:8.8-1032.1692772289
+    # The job outputs link to the outputs of the 'rpmbuild' step
+    steps:
+
+    # Use dnf to install development packages
+    - name: Install development packages
+      run: dnf --assumeyes --disableplugin=subscription-manager install rpm-build go-srpm-macros rpm-build-libs rpm-libs gcc make python38 git wget openssl-devel diffutils delve which
+
+    # Checkout git repository and submodules
+    # fetch-depth must be 0 to use git describe
+    # See: https://github.com/marketplace/actions/checkout
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+        fetch-depth: 0
+
+    # Use dnf to install build dependencies
+    - name: Install build dependencies
+      run: |
+          dnf --assumeyes --disableplugin=subscription-manager install \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-bin-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/golang-src-1.21.7-1.module_el8+960+4060efbe.noarch.rpm \
+              http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/Packages/go-toolset-1.21.7-1.module_el8+960+4060efbe.x86_64.rpm
+
+    - name: RPM build MetricCollector
+      id: rpmbuild
+      run: |
+          git config --global --add safe.directory /__w/cc-metric-collector/cc-metric-collector
+          make RPM
+
+  #
+  # Build on Ubuntu 22.04 using official go package
+  #
+  Ubuntu-jammy-build:
+    runs-on: ubuntu-latest
+    container: ubuntu:22.04
+
+    steps:
+    # Use apt to install development packages
+    - name: Install development packages
+      run: |
+          apt update && apt --assume-yes upgrade
+          apt --assume-yes install build-essential sed git wget bash
+    # Checkout git repository and submodules
+    # fetch-depth must be 0 to use git describe
+    # See: https://github.com/marketplace/actions/checkout
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+        fetch-depth: 0
+    # Use official golang package
+    - name: Install Golang
+      run: |
+          wget -q https://go.dev/dl/go1.21.1.linux-amd64.tar.gz --output-document=- | \
+          tar --directory=/usr/local --extract --gzip
+          export PATH=/usr/local/go/bin:/usr/local/go/pkg/tool/linux_amd64:$PATH
+          go version
+    - name: DEB build MetricCollector
+      id: dpkg-build
+      run: |
+          export PATH=/usr/local/go/bin:/usr/local/go/pkg/tool/linux_amd64:$PATH
+          git config --global --add safe.directory /__w/cc-metric-collector/cc-metric-collector
+          make DEB
--- a/.zenodo.json
+++ b/.zenodo.json
@@ -0,0 +1,29 @@
+{
+  "title": "cc-metric-collector",
+  "description": "Monitoring agent for ClusterCockpit.",
+  "creators": [
+    {
+      "affiliation": "Regionales Rechenzentrum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg",
+      "name": "Thomas Gruber",
+      "orcid": "0000-0001-5560-6964"
+    },
+    {
+      "affiliation": "Steinbuch Centre for Computing, Karlsruher Institut für Technologie",
+      "name": "Holger Obermaier",
+      "orcid": "0000-0002-6830-6626"
+    }
+  ],
+  "upload_type": "software",
+  "license": "MIT",
+  "access_right": "open",
+  "keywords": [
+    "performance-monitoring",
+    "cluster-monitoring",
+    "open-source"
+  ],
+  "communities": [
+    {
+      "identifier": "clustercockpit"
+    }
+  ]
+}
--- a/27
+++ b/27
@@ -84,7 +84,7 @@ RPM: scripts/cc-metric-collector.spec
 	@COMMITISH="HEAD"
 	@VERS=$$(git describe --tags $${COMMITISH})
 	@VERS=$${VERS#v}
-	@VERS=$$(echo $$VERS | sed -e s+'-'+'_'+g)
+	@VERS=$$(echo $${VERS} | sed -e s+'-'+'_'+g)
 	@eval $$(rpmspec --query --queryformat "NAME='%{name}' VERSION='%{version}' RELEASE='%{release}' NVR='%{NVR}' NVRA='%{NVRA}'" --define="VERS $${VERS}" "$${SPECFILE}")
 	@PREFIX="$${NAME}-$${VERSION}"
 	@FORMAT="tar.gz"
@@ -96,10 +96,8 @@ RPM: scripts/cc-metric-collector.spec
 	@if [[ "$${GITHUB_ACTIONS}" == true ]]; then
 	@     RPMFILE="$${RPMDIR}/$${ARCH}/$${NVRA}.rpm"
 	@     SRPMFILE="$${SRPMDIR}/$${NVR}.src.rpm"
-	@     echo "RPM: $${RPMFILE}"
-	@     echo "SRPM: $${SRPMFILE}"
-	@     echo "::set-output name=SRPM::$${SRPMFILE}"
-	@     echo "::set-output name=RPM::$${RPMFILE}"
+	@     echo "SRPM=$${SRPMFILE}" >> $${GITHUB_OUTPUT}
+	@     echo "RPM=$${RPMFILE}" >> $${GITHUB_OUTPUT}
 	@fi

 .PHONY: DEB
@@ -108,21 +106,24 @@ DEB: scripts/cc-metric-collector.deb.control $(APP)
 	@WORKSPACE=$${PWD}/.dpkgbuild
 	@DEBIANDIR=$${WORKSPACE}/debian
 	@DEBIANBINDIR=$${WORKSPACE}/DEBIAN
-	@mkdir --parents --verbose $$WORKSPACE $$DEBIANBINDIR
+	@mkdir --parents --verbose $${WORKSPACE} $${DEBIANBINDIR}
 	#@mkdir --parents --verbose $$DEBIANDIR
 	@CONTROLFILE="$${BASEDIR}/scripts/cc-metric-collector.deb.control"
 	@COMMITISH="HEAD"
 	@VERS=$$(git describe --tags --abbrev=0 $${COMMITISH})
+	@if [ -z "$${VERS}" ]; then VERS=${GITHUB_REF_NAME}; fi
 	@VERS=$${VERS#v}
-	@VERS=$$(echo $$VERS | sed -e s+'-'+'_'+g)
 	@ARCH=$$(uname -m)
-	@ARCH=$$(echo $$ARCH | sed -e s+'_'+'-'+g)
+	@ARCH=$$(echo $${ARCH} | sed -e s+'_'+'-'+g)
+	@if [ "$${ARCH}" = "x86-64" ]; then ARCH=amd64; fi
 	@PREFIX="$${NAME}-$${VERSION}_$${ARCH}"
-	@SIZE_BYTES=$$(du -bcs --exclude=.dpkgbuild "$$WORKSPACE"/ | awk '{print $$1}' | head -1 | sed -e 's/^0\+//')
-	@SIZE="$$(awk -v size="$$SIZE_BYTES" 'BEGIN {print (size/1024)+1}' | awk '{print int($$0)}')"
-	#@sed -e s+"{VERSION}"+"$$VERS"+g -e s+"{INSTALLED_SIZE}"+"$$SIZE"+g -e s+"{ARCH}"+"$$ARCH"+g $$CONTROLFILE > $${DEBIANDIR}/control
-	@sed -e s+"{VERSION}"+"$$VERS"+g -e s+"{INSTALLED_SIZE}"+"$$SIZE"+g -e s+"{ARCH}"+"$$ARCH"+g $$CONTROLFILE > $${DEBIANBINDIR}/control
+	@SIZE_BYTES=$$(du -bcs --exclude=.dpkgbuild "$${WORKSPACE}"/ | awk '{print $$1}' | head -1 | sed -e 's/^0\+//')
+	@SIZE="$$(awk -v size="$${SIZE_BYTES}" 'BEGIN {print (size/1024)+1}' | awk '{print int($$0)}')"
+	@sed -e s+"{VERSION}"+"$${VERS}"+g -e s+"{INSTALLED_SIZE}"+"$${SIZE}"+g -e s+"{ARCH}"+"$${ARCH}"+g $${CONTROLFILE} > $${DEBIANBINDIR}/control
 	@make PREFIX=$${WORKSPACE} install
 	@DEB_FILE="cc-metric-collector_$${VERS}_$${ARCH}.deb"
-	@dpkg-deb -b $${WORKSPACE} "$$DEB_FILE"
+	@dpkg-deb -b $${WORKSPACE} "$${DEB_FILE}"
+	@if [ "$${GITHUB_ACTIONS}" = "true" ]; then
+	@     echo "DEB=$${DEB_FILE}" >> $${GITHUB_OUTPUT}
+	@fi
 	@rm -r "$${WORKSPACE}"
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@ There is a single timer loop that triggers all collectors serially, collects the

 The receiver runs as a go routine side-by-side with the timer loop and asynchronously forwards received metrics to the sink.

+
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.7438287.svg)](https://doi.org/10.5281/zenodo.7438287)
+
+
 # Configuration

 Configuration is implemented using a single json document that is distributed over network and may be persisted as file.
--- a/collectors/Makefile
+++ b/collectors/Makefile
@@ -1,31 +1,33 @@
 # LIKWID version
-LIKWID_VERSION = 5.2.1
-LIKWID_INSTALLED_FOLDER=$(shell dirname $(shell which likwid-topology 2>/dev/null) 2>/dev/null)
+LIKWID_VERSION := 5.2.2
+LIKWID_INSTALLED_FOLDER := $(shell dirname $$(which likwid-topology 2>/dev/null) 2>/dev/null)

-LIKWID_FOLDER="$(shell pwd)/likwid"
+LIKWID_FOLDER := $(CURDIR)/likwid

-all: $(LIKWID_FOLDER)/likwid.h
+all: likwid

 .ONESHELL:
-.PHONY: $(LIKWID_FOLDER)/likwid.h
-$(LIKWID_FOLDER)/likwid.h:
-	if [ "$(LIKWID_INSTALLED_FOLDER)" != "" ]; then \
-		BASE="$(LIKWID_INSTALLED_FOLDER)/../include"; \
-		mkdir -p $(LIKWID_FOLDER); \
-		cp $$BASE/*.h $(LIKWID_FOLDER); \
-	else \
-		BUILD_FOLDER="$${PWD}/likwidbuild"; \
-		if [ -d $(LIKWID_FOLDER) ]; then rm -r $(LIKWID_FOLDER); fi; \
-		mkdir --parents --verbose  $(LIKWID_FOLDER) $${BUILD_FOLDER}; \
-		wget -P "$${BUILD_FOLDER}" http://ftp.rrze.uni-erlangen.de/mirrors/likwid/likwid-$(LIKWID_VERSION).tar.gz; \
-		tar -C $${BUILD_FOLDER} -xf $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION).tar.gz; \
-		install -Dpm 0644 $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes/likwid*.h $(LIKWID_FOLDER)/; \
-		install -Dpm 0644 $${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes/bstrlib.h $(LIKWID_FOLDER)/; \
-		rm -r $${BUILD_FOLDER}; \
+.PHONY: likwid
+likwid:
+	if [ -n "$(LIKWID_INSTALLED_FOLDER)" ]; then
+	    # Using likwid include files from system installation
+	    INCLUDE_DIR="$(LIKWID_INSTALLED_FOLDER)/../include"
+	    mkdir --parents --verbose "$(LIKWID_FOLDER)"
+	    cp "$${INCLUDE_DIR}"/*.h "$(LIKWID_FOLDER)"
+	else
+	    # Using likwid include files from downloaded tar archive
+	    if [ -d "$(LIKWID_FOLDER)" ]; then
+	        rm --recursive "$(LIKWID_FOLDER)"
+	    fi
+	    BUILD_FOLDER="$${PWD}/likwidbuild"
+	    mkdir --parents --verbose  "$${BUILD_FOLDER}"
+	    wget --output-document=- http://ftp.rrze.uni-erlangen.de/mirrors/likwid/likwid-$(LIKWID_VERSION).tar.gz |
+	        tar --directory="$${BUILD_FOLDER}" --extract --gz
+		install -D --verbose --preserve-timestamps --mode=0644 --target-directory="$(LIKWID_FOLDER)" "$${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes"/likwid*.h "$${BUILD_FOLDER}/likwid-$(LIKWID_VERSION)/src/includes"/bstrlib.h
+	    rm --recursive "$${BUILD_FOLDER}"
 	fi


+.PHONY: clean
 clean:
 	rm -rf likwid
-
-.PHONY: clean
--- a/collectors/collectorManager.go
+++ b/collectors/collectorManager.go
@@ -40,6 +40,7 @@ var AvailableCollectors = map[string]MetricCollector{
 	"rocm_smi":        new(RocmSmiCollector),
 	"self":            new(SelfCollector),
 	"schedstat":       new(SchedstatCollector),
+	"nfsiostat":       new(NfsIOStatCollector),
 }

 // Metric collector manager data structure
--- a/collectors/cpufreqCpuinfoMetric.go
+++ b/collectors/cpufreqCpuinfoMetric.go
@@ -14,29 +14,18 @@ import (
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )

-//
 // CPUFreqCollector
 // a metric collector to measure the current frequency of the CPUs
 // as obtained from /proc/cpuinfo
 // Only measure on the first hyperthread
-//
 type CPUFreqCpuInfoCollectorTopology struct {
-	processor               string // logical processor number (continuous, starting at 0)
-	coreID                  string // socket local core ID
-	coreID_int              int64
-	physicalPackageID       string // socket / package ID
-	physicalPackageID_int   int64
-	numPhysicalPackages     string // number of  sockets / packages
-	numPhysicalPackages_int int64
-	isHT                    bool
-	numNonHT                string // number of non hyperthreading processors
-	numNonHT_int            int64
-	tagSet                  map[string]string
+	isHT   bool
+	tagSet map[string]string
 }

 type CPUFreqCpuInfoCollector struct {
 	metricCollector
-	topology []*CPUFreqCpuInfoCollectorTopology
+	topology []CPUFreqCpuInfoCollectorTopology
 }

 func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {
@@ -65,11 +54,9 @@ func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {
 	// Collect topology information from file cpuinfo
 	foundFreq := false
 	processor := ""
-	var numNonHT_int int64 = 0
 	coreID := ""
 	physicalPackageID := ""
-	var maxPhysicalPackageID int64 = 0
-	m.topology = make([]*CPUFreqCpuInfoCollectorTopology, 0)
+	m.topology = make([]CPUFreqCpuInfoCollectorTopology, 0)
 	coreSeenBefore := make(map[string]bool)

 	// Read cpuinfo file, line by line
@@ -98,41 +85,22 @@ func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {
 			len(coreID) > 0 &&
 			len(physicalPackageID) > 0 {

-			topology := new(CPUFreqCpuInfoCollectorTopology)
-
-			// Processor
-			topology.processor = processor
-
-			// Core ID
-			topology.coreID = coreID
-			topology.coreID_int, err = strconv.ParseInt(coreID, 10, 64)
-			if err != nil {
-				return fmt.Errorf("unable to convert coreID '%s' to int64: %v", coreID, err)
-			}
-
-			// Physical package ID
-			topology.physicalPackageID = physicalPackageID
-			topology.physicalPackageID_int, err = strconv.ParseInt(physicalPackageID, 10, 64)
-			if err != nil {
-				return fmt.Errorf("unable to convert physicalPackageID '%s' to int64: %v", physicalPackageID, err)
-			}
-
-			// increase maximun socket / package ID, when required
-			if topology.physicalPackageID_int > maxPhysicalPackageID {
-				maxPhysicalPackageID = topology.physicalPackageID_int
-			}
-
-			// is hyperthread?
 			globalID := physicalPackageID + ":" + coreID
-			topology.isHT = coreSeenBefore[globalID]
-			coreSeenBefore[globalID] = true
-			if !topology.isHT {
-				// increase number on non hyper thread cores
-				numNonHT_int++
-			}

 			// store collected topology information
-			m.topology = append(m.topology, topology)
+			m.topology = append(m.topology,
+				CPUFreqCpuInfoCollectorTopology{
+					isHT: coreSeenBefore[globalID],
+					tagSet: map[string]string{
+						"type":       "hwthread",
+						"type-id":    processor,
+						"package_id": physicalPackageID,
+					},
+				},
+			)
+
+			// mark core as seen before
+			coreSeenBefore[globalID] = true

 			// reset topology information
 			foundFreq = false
@@ -142,24 +110,9 @@ func (m *CPUFreqCpuInfoCollector) Init(config json.RawMessage) error {
 		}
 	}

-        // Check if at least one CPU with frequency information was detected
-        if len(m.topology) == 0 {
-                return fmt.Errorf("No CPU frequency info found in %s", cpuInfoFile)
-        }
-
-	numPhysicalPackageID_int := maxPhysicalPackageID + 1
-	numPhysicalPackageID := fmt.Sprint(numPhysicalPackageID_int)
-	numNonHT := fmt.Sprint(numNonHT_int)
-	for _, t := range m.topology {
-		t.numPhysicalPackages = numPhysicalPackageID
-		t.numPhysicalPackages_int = numPhysicalPackageID_int
-		t.numNonHT = numNonHT
-		t.numNonHT_int = numNonHT_int
-		t.tagSet = map[string]string{
-			"type":       "hwthread",
-			"type-id":    t.processor,
-			"package_id": t.physicalPackageID,
-		}
+	// Check if at least one CPU with frequency information was detected
+	if len(m.topology) == 0 {
+		return fmt.Errorf("No CPU frequency info found in %s", cpuInfoFile)
 	}

 	m.init = true
--- a/collectors/cpufreqCpuinfoMetric.md
+++ b/collectors/cpufreqCpuinfoMetric.md
@@ -1,5 +1,5 @@
-
 ## `cpufreq_cpuinfo` collector
+
 ```json
  "cpufreq_cpuinfo": {}
 ```
@@ -7,4 +7,5 @@
 The `cpufreq_cpuinfo` collector reads the clock frequency from `/proc/cpuinfo` and outputs a handful **hwthread** metrics.

 Metrics:
+
 * `cpufreq`
--- a/collectors/cpufreqMetric.go
+++ b/collectors/cpufreqMetric.go
@@ -11,22 +11,13 @@ import (

 	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	"github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 	"golang.org/x/sys/unix"
 )

 type CPUFreqCollectorTopology struct {
-	processor               string // logical processor number (continuous, starting at 0)
-	coreID                  string // socket local core ID
-	coreID_int              int64
-	physicalPackageID       string // socket / package ID
-	physicalPackageID_int   int64
-	numPhysicalPackages     string // number of  sockets / packages
-	numPhysicalPackages_int int64
-	isHT                    bool
-	numNonHT                string // number of non hyper-threading processors
-	numNonHT_int            int64
-	scalingCurFreqFile      string
-	tagSet                  map[string]string
+	scalingCurFreqFile string
+	tagSet             map[string]string
 }

 // CPUFreqCollector
@@ -64,112 +55,38 @@ func (m *CPUFreqCollector) Init(config json.RawMessage) error {
 		"unit":   "Hz",
 	}

-	// Loop for all CPU directories
-	baseDir := "/sys/devices/system/cpu"
-	globPattern := filepath.Join(baseDir, "cpu[0-9]*")
-	cpuDirs, err := filepath.Glob(globPattern)
-	if err != nil {
-		return fmt.Errorf("unable to glob files with pattern '%s': %v", globPattern, err)
-	}
-	if cpuDirs == nil {
-		return fmt.Errorf("unable to find any files with pattern '%s'", globPattern)
-	}
+	m.topology = make([]CPUFreqCollectorTopology, 0)
+	for _, c := range ccTopology.CpuData() {

-	// Initialize CPU topology
-	m.topology = make([]CPUFreqCollectorTopology, len(cpuDirs))
-	for _, cpuDir := range cpuDirs {
-		processor := strings.TrimPrefix(cpuDir, "/sys/devices/system/cpu/cpu")
-		processor_int, err := strconv.ParseInt(processor, 10, 64)
-		if err != nil {
-			return fmt.Errorf("unable to convert cpuID '%s' to int64: %v", processor, err)
-		}
-
-		// Read package ID
-		physicalPackageIDFile := filepath.Join(cpuDir, "topology", "physical_package_id")
-		line, err := os.ReadFile(physicalPackageIDFile)
-		if err != nil {
-			return fmt.Errorf("unable to read physical package ID from file '%s': %v", physicalPackageIDFile, err)
-		}
-		physicalPackageID := strings.TrimSpace(string(line))
-		physicalPackageID_int, err := strconv.ParseInt(physicalPackageID, 10, 64)
-		if err != nil {
-			return fmt.Errorf("unable to convert packageID '%s' to int64: %v", physicalPackageID, err)
-		}
-
-		// Read core ID
-		coreIDFile := filepath.Join(cpuDir, "topology", "core_id")
-		line, err = os.ReadFile(coreIDFile)
-		if err != nil {
-			return fmt.Errorf("unable to read core ID from file '%s': %v", coreIDFile, err)
-		}
-		coreID := strings.TrimSpace(string(line))
-		coreID_int, err := strconv.ParseInt(coreID, 10, 64)
-		if err != nil {
-			return fmt.Errorf("unable to convert coreID '%s' to int64: %v", coreID, err)
+		// Skip hyper threading CPUs
+		if c.CpuID != c.CoreCPUsList[0] {
+			continue
 		}

 		// Check access to current frequency file
-		scalingCurFreqFile := filepath.Join(cpuDir, "cpufreq", "scaling_cur_freq")
-		err = unix.Access(scalingCurFreqFile, unix.R_OK)
+		scalingCurFreqFile := filepath.Join("/sys/devices/system/cpu", fmt.Sprintf("cpu%d", c.CpuID), "cpufreq/scaling_cur_freq")
+		err := unix.Access(scalingCurFreqFile, unix.R_OK)
 		if err != nil {
 			return fmt.Errorf("unable to access file '%s': %v", scalingCurFreqFile, err)
 		}

-		t := &m.topology[processor_int]
-		t.processor = processor
-		t.physicalPackageID = physicalPackageID
-		t.physicalPackageID_int = physicalPackageID_int
-		t.coreID = coreID
-		t.coreID_int = coreID_int
-		t.scalingCurFreqFile = scalingCurFreqFile
-	}
-
-	// is processor a hyper-thread?
-	coreSeenBefore := make(map[string]bool)
-	for i := range m.topology {
-		t := &m.topology[i]
-
-		globalID := t.physicalPackageID + ":" + t.coreID
-		t.isHT = coreSeenBefore[globalID]
-		coreSeenBefore[globalID] = true
-	}
-
-	// number of non hyper-thread cores and packages / sockets
-	var numNonHT_int int64 = 0
-	PhysicalPackageIDs := make(map[int64]struct{})
-	for i := range m.topology {
-		t := &m.topology[i]
-
-		if !t.isHT {
-			numNonHT_int++
-		}
-
-		PhysicalPackageIDs[t.physicalPackageID_int] = struct{}{}
-	}
-
-	numPhysicalPackageID_int := int64(len(PhysicalPackageIDs))
-	numPhysicalPackageID := fmt.Sprint(numPhysicalPackageID_int)
-	numNonHT := fmt.Sprint(numNonHT_int)
-	for i := range m.topology {
-		t := &m.topology[i]
-		t.numPhysicalPackages = numPhysicalPackageID
-		t.numPhysicalPackages_int = numPhysicalPackageID_int
-		t.numNonHT = numNonHT
-		t.numNonHT_int = numNonHT_int
-		t.tagSet = map[string]string{
-			"type":       "hwthread",
-			"type-id":    t.processor,
-			"package_id": t.physicalPackageID,
-		}
+		m.topology = append(m.topology,
+			CPUFreqCollectorTopology{
+				tagSet: map[string]string{
+					"type":       "hwthread",
+					"type-id":    fmt.Sprint(c.CpuID),
+					"package_id": fmt.Sprint(c.Socket),
+				},
+				scalingCurFreqFile: scalingCurFreqFile,
+			},
+		)
 	}

 	// Initialized
 	cclog.ComponentDebug(
 		m.name,
 		"initialized",
-		numPhysicalPackageID_int, "physical packages,",
-		len(cpuDirs), "CPUs,",
-		numNonHT, "non-hyper-threading CPUs")
+		len(m.topology), "non-hyper-threading CPUs")
 	m.init = true
 	return nil
 }
@@ -184,11 +101,6 @@ func (m *CPUFreqCollector) Read(interval time.Duration, output chan lp.CCMetric)
 	for i := range m.topology {
 		t := &m.topology[i]

-		// skip hyper-threads
-		if t.isHT {
-			continue
-		}
-
 		// Read current frequency
 		line, err := os.ReadFile(t.scalingCurFreqFile)
 		if err != nil {
--- a/collectors/cpustatMetric.go
+++ b/collectors/cpustatMetric.go
@@ -119,12 +119,21 @@ func (m *CpustatCollector) parseStatLine(linefields []string, tags map[string]st
 		}
 	}

+	sum := float64(0)
 	for name, value := range values {
+		sum += value
 		y, err := lp.New(name, tags, m.meta, map[string]interface{}{"value": value * 100}, now)
 		if err == nil {
 			output <- y
 		}
 	}
+	if v, ok := values["cpu_idle"]; ok {
+		sum -= v
+		y, err := lp.New("cpu_used", tags, m.meta, map[string]interface{}{"value": sum * 100}, now)
+		if err == nil {
+			output <- y
+		}
+	}
 }

 func (m *CpustatCollector) Read(interval time.Duration, output chan lp.CCMetric) {
--- a/collectors/cpustatMetric.md
+++ b/collectors/cpustatMetric.md
@@ -23,3 +23,4 @@ Metrics:
 * `cpu_steal`
 * `cpu_guest`
 * `cpu_guest_nice`
+* `cpu_used` = `cpu_* - cpu_idle`
--- a/collectors/customCmdMetric.go
+++ b/collectors/customCmdMetric.go
@@ -48,7 +48,7 @@ func (m *CustomCmdCollector) Init(config json.RawMessage) error {
 		command := exec.Command(cmdfields[0], strings.Join(cmdfields[1:], " "))
 		command.Wait()
 		_, err = command.Output()
-		if err != nil {
+		if err == nil {
 			m.commands = append(m.commands, c)
 		}
 	}
@@ -99,10 +99,7 @@ func (m *CustomCmdCollector) Read(interval time.Duration, output chan lp.CCMetri
 				continue
 			}

-			y := lp.FromInfluxMetric(c)
-			if err == nil {
-				output <- y
-			}
+			output <- lp.FromInfluxMetric(c)
 		}
 	}
 	for _, file := range m.files {
@@ -121,10 +118,7 @@ func (m *CustomCmdCollector) Read(interval time.Duration, output chan lp.CCMetri
 			if skip {
 				continue
 			}
-			y := lp.FromInfluxMetric(f)
-			if err == nil {
-				output <- y
-			}
+			output <- lp.FromInfluxMetric(f)
 		}
 	}
 }
--- a/collectors/gpfsMetric.go
+++ b/collectors/gpfsMetric.go
@@ -31,6 +31,7 @@ type GpfsCollector struct {
 		Mmpmon            string   `json:"mmpmon_path,omitempty"`
 		ExcludeFilesystem []string `json:"exclude_filesystem,omitempty"`
 		SendBandwidths    bool     `json:"send_bandwidths"`
+		SendTotalValues   bool     `json:"send_total_values"`
 	}
 	skipFS        map[string]struct{}
 	lastTimestamp time.Time // Store time stamp of last tick to derive bandwidths
@@ -216,13 +217,33 @@ func (m *GpfsCollector) Read(interval time.Duration, output chan lp.CCMetric) {
 				fmt.Sprintf("Read(): Failed to convert bytes read '%s' to int64: %v", key_value["_br_"], err))
 			continue
 		}
-		if y, err := lp.New("gpfs_bytes_read", m.tags, m.meta, map[string]interface{}{"value": bytesRead}, timestamp); err == nil {
+		if y, err :=
+			lp.New(
+				"gpfs_bytes_read",
+				m.tags,
+				m.meta,
+				map[string]interface{}{
+					"value": bytesRead,
+				},
+				timestamp,
+			); err == nil {
+			y.AddMeta("unit", "bytes")
 			output <- y
 		}
 		if m.config.SendBandwidths {
 			if lastBytesRead := m.lastState[filesystem].bytesRead; lastBytesRead >= 0 {
 				bwRead := float64(bytesRead-lastBytesRead) / timeDiff
-				if y, err := lp.New("gpfs_bw_read", m.tags, m.meta, map[string]interface{}{"value": bwRead}, timestamp); err == nil {
+				if y, err :=
+					lp.New(
+						"gpfs_bw_read",
+						m.tags,
+						m.meta,
+						map[string]interface{}{
+							"value": bwRead,
+						},
+						timestamp,
+					); err == nil {
+					y.AddMeta("unit", "bytes/sec")
 					output <- y
 				}
 			}
@@ -236,13 +257,33 @@ func (m *GpfsCollector) Read(interval time.Duration, output chan lp.CCMetric) {
 				fmt.Sprintf("Read(): Failed to convert bytes written '%s' to int64: %v", key_value["_bw_"], err))
 			continue
 		}
-		if y, err := lp.New("gpfs_bytes_written", m.tags, m.meta, map[string]interface{}{"value": bytesWritten}, timestamp); err == nil {
+		if y, err :=
+			lp.New(
+				"gpfs_bytes_written",
+				m.tags,
+				m.meta,
+				map[string]interface{}{
+					"value": bytesWritten,
+				},
+				timestamp,
+			); err == nil {
+			y.AddMeta("unit", "bytes")
 			output <- y
 		}
 		if m.config.SendBandwidths {
 			if lastBytesWritten := m.lastState[filesystem].bytesRead; lastBytesWritten >= 0 {
 				bwWrite := float64(bytesWritten-lastBytesWritten) / timeDiff
-				if y, err := lp.New("gpfs_bw_write", m.tags, m.meta, map[string]interface{}{"value": bwWrite}, timestamp); err == nil {
+				if y, err :=
+					lp.New(
+						"gpfs_bw_write",
+						m.tags,
+						m.meta,
+						map[string]interface{}{
+							"value": bwWrite,
+						},
+						timestamp,
+					); err == nil {
+					y.AddMeta("unit", "bytes/sec")
 					output <- y
 				}
 			}
@@ -326,6 +367,47 @@ func (m *GpfsCollector) Read(interval time.Duration, output chan lp.CCMetric) {
 		if y, err := lp.New("gpfs_num_inode_updates", m.tags, m.meta, map[string]interface{}{"value": numInodeUpdates}, timestamp); err == nil {
 			output <- y
 		}
+
+		// Total values
+		if m.config.SendTotalValues {
+			bytesTotal := bytesRead + bytesWritten
+			if y, err :=
+				lp.New("gpfs_bytes_total",
+					m.tags,
+					m.meta,
+					map[string]interface{}{
+						"value": bytesTotal,
+					},
+					timestamp,
+				); err == nil {
+				y.AddMeta("unit", "bytes")
+				output <- y
+			}
+			iops := numReads + numWrites
+			if y, err :=
+				lp.New("gpfs_iops",
+					m.tags,
+					m.meta,
+					map[string]interface{}{
+						"value": iops,
+					},
+					timestamp,
+				); err == nil {
+				output <- y
+			}
+			metaops := numInodeUpdates + numCloses + numOpens + numReaddirs
+			if y, err :=
+				lp.New("gpfs_metaops",
+					m.tags,
+					m.meta,
+					map[string]interface{}{
+						"value": metaops,
+					},
+					timestamp,
+				); err == nil {
+				output <- y
+			}
+		}
 	}
 }

--- a/collectors/gpfsMetric.md
+++ b/collectors/gpfsMetric.md
@@ -6,7 +6,8 @@
    "exclude_filesystem": [
      "fs1"
    ],
-    "send_bandwidths" : true
+    "send_bandwidths": true,
+    "send_total_values": true
  }
 ```

@@ -26,8 +27,12 @@ Metrics:
 * `gpfs_num_opens`
 * `gpfs_num_closes`
 * `gpfs_num_reads`
+* `gpfs_num_writes`
 * `gpfs_num_readdirs`
 * `gpfs_num_inode_updates`
+* `gpfs_bytes_total = gpfs_bytes_read + gpfs_bytes_written` (if `send_total_values == true`)
+* `gpfs_iops = gpfs_num_reads + gpfs_num_writes` (if `send_total_values == true`)
+* `gpfs_metaops = gpfs_num_inode_updates + gpfs_num_closes + gpfs_num_opens + gpfs_num_readdirs` (if `send_total_values == true`)
 * `gpfs_bw_read` (if `send_bandwidths == true`)
 * `gpfs_bw_write` (if `send_bandwidths == true`)

--- a/collectors/infinibandMetric.go
+++ b/collectors/infinibandMetric.go
@@ -18,18 +18,22 @@ import (
 const IB_BASEPATH = "/sys/class/infiniband/"

 type InfinibandCollectorMetric struct {
-	path  string
-	unit  string
-	scale int64
+	name             string
+	path             string
+	unit             string
+	scale            int64
+	addToIBTotal     bool
+	addToIBTotalPkgs bool
+	currentState     int64
+	lastState        int64
 }

 type InfinibandCollectorInfo struct {
-	LID              string                               // IB local Identifier (LID)
-	device           string                               // IB device
-	port             string                               // IB device port
-	portCounterFiles map[string]InfinibandCollectorMetric // mapping counter name -> InfinibandCollectorMetric
-	tagSet           map[string]string                    // corresponding tag list
-	lastState        map[string]int64                     // State from last measurement
+	LID              string                      // IB local Identifier (LID)
+	device           string                      // IB device
+	port             string                      // IB device port
+	portCounterFiles []InfinibandCollectorMetric // mapping counter name -> InfinibandCollectorMetric
+	tagSet           map[string]string           // corresponding tag list
 }

 type InfinibandCollector struct {
@@ -37,9 +41,10 @@ type InfinibandCollector struct {
 	config struct {
 		ExcludeDevices     []string `json:"exclude_devices,omitempty"` // IB device to exclude e.g. mlx5_0
 		SendAbsoluteValues bool     `json:"send_abs_values"`           // Send absolut values as read from sys filesystem
+		SendTotalValues    bool     `json:"send_total_values"`         // Send computed total values
 		SendDerivedValues  bool     `json:"send_derived_values"`       // Send derived values e.g. rates
 	}
-	info          []*InfinibandCollectorInfo
+	info          []InfinibandCollectorInfo
 	lastTimestamp time.Time // Store time stamp of last tick to derive bandwidths
 }

@@ -112,11 +117,39 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {

 		// Check access to counter files
 		countersDir := filepath.Join(path, "counters")
-		portCounterFiles := map[string]InfinibandCollectorMetric{
-			"ib_recv":      {path: filepath.Join(countersDir, "port_rcv_data"), unit: "bytes", scale: 4},
-			"ib_xmit":      {path: filepath.Join(countersDir, "port_xmit_data"), unit: "bytes", scale: 4},
-			"ib_recv_pkts": {path: filepath.Join(countersDir, "port_rcv_packets"), unit: "packets", scale: 1},
-			"ib_xmit_pkts": {path: filepath.Join(countersDir, "port_xmit_packets"), unit: "packets", scale: 1},
+		portCounterFiles := []InfinibandCollectorMetric{
+			{
+				name:         "ib_recv",
+				path:         filepath.Join(countersDir, "port_rcv_data"),
+				unit:         "bytes",
+				scale:        4,
+				addToIBTotal: true,
+				lastState:    -1,
+			},
+			{
+				name:         "ib_xmit",
+				path:         filepath.Join(countersDir, "port_xmit_data"),
+				unit:         "bytes",
+				scale:        4,
+				addToIBTotal: true,
+				lastState:    -1,
+			},
+			{
+				name:             "ib_recv_pkts",
+				path:             filepath.Join(countersDir, "port_rcv_packets"),
+				unit:             "packets",
+				scale:            1,
+				addToIBTotalPkgs: true,
+				lastState:        -1,
+			},
+			{
+				name:             "ib_xmit_pkts",
+				path:             filepath.Join(countersDir, "port_xmit_packets"),
+				unit:             "packets",
+				scale:            1,
+				addToIBTotalPkgs: true,
+				lastState:        -1,
+			},
 		}
 		for _, counter := range portCounterFiles {
 			err := unix.Access(counter.path, unix.R_OK)
@@ -125,14 +158,8 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {
 			}
 		}

-		// Initialize last state
-		lastState := make(map[string]int64)
-		for counter := range portCounterFiles {
-			lastState[counter] = -1
-		}
-
 		m.info = append(m.info,
-			&InfinibandCollectorInfo{
+			InfinibandCollectorInfo{
 				LID:              LID,
 				device:           device,
 				port:             port,
@@ -143,7 +170,6 @@ func (m *InfinibandCollector) Init(config json.RawMessage) error {
 					"port":   port,
 					"lid":    LID,
 				},
-				lastState: lastState,
 			})
 	}

@@ -170,8 +196,12 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMetr
 	// Save current timestamp
 	m.lastTimestamp = now

-	for _, info := range m.info {
-		for counterName, counterDef := range info.portCounterFiles {
+	for i := range m.info {
+		info := &m.info[i]
+
+		var ib_total, ib_total_pkts int64
+		for i := range info.portCounterFiles {
+			counterDef := &info.portCounterFiles[i]

 			// Read counter file
 			line, err := os.ReadFile(counterDef.path)
@@ -188,15 +218,26 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMetr
 			if err != nil {
 				cclog.ComponentError(
 					m.name,
-					fmt.Sprintf("Read(): Failed to convert Infininiband metrice %s='%s' to int64: %v", counterName, data, err))
+					fmt.Sprintf("Read(): Failed to convert Infininiband metrice %s='%s' to int64: %v", counterDef.name, data, err))
 				continue
 			}
 			// Scale raw value
 			v *= counterDef.scale

+			// Save current state
+			counterDef.currentState = v
+
 			// Send absolut values
 			if m.config.SendAbsoluteValues {
-				if y, err := lp.New(counterName, info.tagSet, m.meta, map[string]interface{}{"value": v}, now); err == nil {
+				if y, err :=
+					lp.New(
+						counterDef.name,
+						info.tagSet,
+						m.meta,
+						map[string]interface{}{
+							"value": counterDef.currentState,
+						},
+						now); err == nil {
 					y.AddMeta("unit", counterDef.unit)
 					output <- y
 				}
@@ -204,18 +245,64 @@ func (m *InfinibandCollector) Read(interval time.Duration, output chan lp.CCMetr

 			// Send derived values
 			if m.config.SendDerivedValues {
-				if info.lastState[counterName] >= 0 {
-					rate := float64((v - info.lastState[counterName])) / timeDiff
-					if y, err := lp.New(counterName+"_bw", info.tagSet, m.meta, map[string]interface{}{"value": rate}, now); err == nil {
+				if counterDef.lastState >= 0 {
+					rate := float64((counterDef.currentState - counterDef.lastState)) / timeDiff
+					if y, err :=
+						lp.New(
+							counterDef.name+"_bw",
+							info.tagSet,
+							m.meta,
+							map[string]interface{}{
+								"value": rate,
+							},
+							now); err == nil {
 						y.AddMeta("unit", counterDef.unit+"/sec")
 						output <- y
+
 					}
 				}
-				// Save current state
-				info.lastState[counterName] = v
+				counterDef.lastState = counterDef.currentState
+			}
+
+			// Sum up total values
+			if m.config.SendTotalValues {
+				switch {
+				case counterDef.addToIBTotal:
+					ib_total += counterDef.currentState
+				case counterDef.addToIBTotalPkgs:
+					ib_total_pkts += counterDef.currentState
+				}
 			}
 		}

+		// Send total values
+		if m.config.SendTotalValues {
+			if y, err :=
+				lp.New(
+					"ib_total",
+					info.tagSet,
+					m.meta,
+					map[string]interface{}{
+						"value": ib_total,
+					},
+					now); err == nil {
+				y.AddMeta("unit", "bytes")
+				output <- y
+			}
+
+			if y, err :=
+				lp.New(
+					"ib_total_pkts",
+					info.tagSet,
+					m.meta,
+					map[string]interface{}{
+						"value": ib_total_pkts,
+					},
+					now); err == nil {
+				y.AddMeta("unit", "packets")
+				output <- y
+			}
+		}
 	}
 }

--- a/collectors/infinibandMetric.md
+++ b/collectors/infinibandMetric.md
@@ -17,13 +17,16 @@ LID file (`/sys/class/infiniband/<dev>/ports/<port>/lid`)

 The devices can be filtered with the `exclude_devices` option in the configuration.

-For each found LID the collector reads data through the sysfs files below `/sys/class/infiniband/<device>`.
+For each found LID the collector reads data through the sysfs files below `/sys/class/infiniband/<device>`. (See: <https://www.kernel.org/doc/Documentation/ABI/stable/sysfs-class-infiniband>)

 Metrics:
+
 * `ib_recv`
 * `ib_xmit`
 * `ib_recv_pkts`
 * `ib_xmit_pkts`
+* `ib_total = ib_recv + ib_xmit` (if `send_total_values == true`)
+* `ib_total_pkts = ib_recv_pkts + ib_xmit_pkts` (if `send_total_values == true`)
 * `ib_recv_bw` (if `send_derived_values == true`)
 * `ib_xmit_bw` (if `send_derived_values == true`)
 * `ib_recv_pkts_bw` (if `send_derived_values == true`)
--- a/collectors/ipmiMetric.go
+++ b/collectors/ipmiMetric.go
@@ -12,7 +12,6 @@ import (
 	"strconv"
 	"strings"
 	"time"
-
 	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )
--- a/collectors/likwidMetric.go
+++ b/collectors/likwidMetric.go
@@ -15,6 +15,7 @@ import (
 	"math"
 	"os"
 	"os/signal"
+	"os/user"
 	"sort"
 	"strconv"
 	"strings"
@@ -28,20 +29,26 @@ import (
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 	"github.com/NVIDIA/go-nvml/pkg/dl"
+	"github.com/fsnotify/fsnotify"
+	"golang.design/x/thread"
 )

 const (
 	LIKWID_LIB_NAME       = "liblikwid.so"
 	LIKWID_LIB_DL_FLAGS   = dl.RTLD_LAZY | dl.RTLD_GLOBAL
 	LIKWID_DEF_ACCESSMODE = "direct"
+	LIKWID_DEF_LOCKFILE   = "/var/run/likwid.lock"
 )

 type LikwidCollectorMetricConfig struct {
-	Name    string `json:"name"` // Name of the metric
-	Calc    string `json:"calc"` // Calculation for the metric using
-	Type    string `json:"type"` // Metric type (aka node, socket, cpu, ...)
-	Publish bool   `json:"publish"`
-	Unit    string `json:"unit"` // Unit of metric if any
+	Name               string `json:"name"` // Name of the metric
+	Calc               string `json:"calc"` // Calculation for the metric using
+	Type               string `json:"type"` // Metric type (aka node, socket, cpu, ...)
+	Publish            bool   `json:"publish"`
+	SendCoreTotalVal   bool   `json:"send_core_total_values,omitempty"`
+	SendSocketTotalVal bool   `json:"send_socket_total_values,omitempty"`
+	SendNodeTotalVal   bool   `json:"send_node_total_values,omitempty"`
+	Unit               string `json:"unit"` // Unit of metric if any
 }

 type LikwidCollectorEventsetConfig struct {
@@ -55,7 +62,7 @@ type LikwidEventsetConfig struct {
 	eorder   []*C.char
 	estr     *C.char
 	go_estr  string
-	results  map[int]map[string]interface{}
+	results  map[int]map[string]float64
 	metrics  map[int]map[string]float64
 }

@@ -67,22 +74,26 @@ type LikwidCollectorConfig struct {
 	AccessMode     string                          `json:"access_mode,omitempty"`
 	DaemonPath     string                          `json:"accessdaemon_path,omitempty"`
 	LibraryPath    string                          `json:"liblikwid_path,omitempty"`
+	LockfilePath   string                          `json:"lockfile_path,omitempty"`
 }

 type LikwidCollector struct {
 	metricCollector
-	cpulist      []C.int
-	cpu2tid      map[int]int
-	sock2tid     map[int]int
-	metrics      map[C.int]map[string]int
-	groups       []C.int
-	config       LikwidCollectorConfig
-	gmresults    map[int]map[string]float64
-	basefreq     float64
-	running      bool
-	initialized  bool
-	likwidGroups map[C.int]LikwidEventsetConfig
-	lock         sync.Mutex
+	cpulist       []C.int
+	cpu2tid       map[int]int
+	sock2tid      map[int]int
+	tid2core      map[int]int
+	tid2socket    map[int]int
+	metrics       map[C.int]map[string]int
+	groups        []C.int
+	config        LikwidCollectorConfig
+	basefreq      float64
+	running       bool
+	initialized   bool
+	needs_reinit  bool
+	likwidGroups  map[C.int]LikwidEventsetConfig
+	lock          sync.Mutex
+	measureThread thread.Thread
 }

 type LikwidMetric struct {
@@ -92,6 +103,18 @@ type LikwidMetric struct {
 	group_idx int
 }

+func checkMetricType(t string) bool {
+	valid := map[string]bool{
+		"node":         true,
+		"socket":       true,
+		"hwthread":     true,
+		"core":         true,
+		"memoryDomain": true,
+	}
+	_, ok := valid[t]
+	return ok
+}
+
 func eventsToEventStr(events map[string]string) string {
 	elist := make([]string, 0)
 	for k, v := range events {
@@ -115,10 +138,10 @@ func genLikwidEventSet(input LikwidCollectorEventsetConfig) LikwidEventsetConfig
 		elist = append(elist, c_counter)
 	}
 	estr := strings.Join(tmplist, ",")
-	res := make(map[int]map[string]interface{})
+	res := make(map[int]map[string]float64)
 	met := make(map[int]map[string]float64)
 	for _, i := range topo.CpuList() {
-		res[i] = make(map[string]interface{})
+		res[i] = make(map[string]float64)
 		for k := range input.Events {
 			res[i][k] = 0.0
 		}
@@ -138,7 +161,7 @@ func genLikwidEventSet(input LikwidCollectorEventsetConfig) LikwidEventsetConfig
 }

 func testLikwidMetricFormula(formula string, params []string) bool {
-	myparams := make(map[string]interface{})
+	myparams := make(map[string]float64)
 	for _, p := range params {
 		myparams[p] = float64(1.0)
 	}
@@ -179,9 +202,11 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 	m.name = "LikwidCollector"
 	m.parallel = false
 	m.initialized = false
+	m.needs_reinit = true
 	m.running = false
 	m.config.AccessMode = LIKWID_DEF_ACCESSMODE
 	m.config.LibraryPath = LIKWID_LIB_NAME
+	m.config.LockfilePath = LIKWID_DEF_LOCKFILE
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &m.config)
 		if err != nil {
@@ -215,13 +240,6 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {

 	m.likwidGroups = make(map[C.int]LikwidEventsetConfig)

-	// m.results = make(map[int]map[int]map[string]interface{})
-	// m.mresults = make(map[int]map[int]map[string]float64)
-	m.gmresults = make(map[int]map[string]float64)
-	for _, tid := range m.cpu2tid {
-		m.gmresults[tid] = make(map[string]float64)
-	}
-
 	// This is for the global metrics computation test
 	totalMetrics := 0
 	// Generate parameter list for the metric computing test
@@ -239,12 +257,16 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 			}
 			for _, metric := range evset.Metrics {
 				// Try to evaluate the metric
-				if testLikwidMetricFormula(metric.Calc, params) {
-					// Add the computable metric to the parameter list for the global metrics
+				cclog.ComponentDebug(m.name, "Checking", metric.Name)
+				if !checkMetricType(metric.Type) {
+					cclog.ComponentError(m.name, "Metric", metric.Name, "uses invalid type", metric.Type)
+					metric.Calc = ""
+				} else if !testLikwidMetricFormula(metric.Calc, params) {
+					cclog.ComponentError(m.name, "Metric", metric.Name, "cannot be calculated with given counters")
+					metric.Calc = ""
+				} else {
 					globalParams = append(globalParams, metric.Name)
 					totalMetrics++
-				} else {
-					metric.Calc = ""
 				}
 			}
 		} else {
@@ -254,8 +276,14 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 	}
 	for _, metric := range m.config.Metrics {
 		// Try to evaluate the global metric
-		if !testLikwidMetricFormula(metric.Calc, globalParams) {
-			cclog.ComponentError(m.name, "Calculation for metric", metric.Name, "failed")
+		if !checkMetricType(metric.Type) {
+			cclog.ComponentError(m.name, "Metric", metric.Name, "uses invalid type", metric.Type)
+			metric.Calc = ""
+		} else if !testLikwidMetricFormula(metric.Calc, globalParams) {
+			cclog.ComponentError(m.name, "Metric", metric.Name, "cannot be calculated with given counters")
+			metric.Calc = ""
+		} else if !checkMetricType(metric.Type) {
+			cclog.ComponentError(m.name, "Metric", metric.Name, "has invalid type")
 			metric.Calc = ""
 		} else {
 			totalMetrics++
@@ -268,56 +296,243 @@ func (m *LikwidCollector) Init(config json.RawMessage) error {
 		cclog.ComponentError(m.name, err.Error())
 		return err
 	}
+
+	ret := C.topology_init()
+	if ret != 0 {
+		err := errors.New("failed to initialize topology module")
+		cclog.ComponentError(m.name, err.Error())
+		return err
+	}
+	m.measureThread = thread.New()
+	switch m.config.AccessMode {
+	case "direct":
+		C.HPMmode(0)
+	case "accessdaemon":
+		if len(m.config.DaemonPath) > 0 {
+			p := os.Getenv("PATH")
+			os.Setenv("PATH", m.config.DaemonPath+":"+p)
+		}
+		C.HPMmode(1)
+		retCode := C.HPMinit()
+		if retCode != 0 {
+			err := fmt.Errorf("C.HPMinit() failed with return code %v", retCode)
+			cclog.ComponentError(m.name, err.Error())
+		}
+		for _, c := range m.cpulist {
+			m.measureThread.Call(
+				func() {
+					retCode := C.HPMaddThread(c)
+					if retCode != 0 {
+						err := fmt.Errorf("C.HPMaddThread(%v) failed with return code %v", c, retCode)
+						cclog.ComponentError(m.name, err.Error())
+					}
+				})
+		}
+	}
+	m.sock2tid = make(map[int]int)
+	tmp := make([]C.int, 1)
+	for _, sid := range topo.SocketList() {
+		cstr := C.CString(fmt.Sprintf("S%d:0", sid))
+		ret = C.cpustr_to_cpulist(cstr, &tmp[0], 1)
+		if ret > 0 {
+			m.sock2tid[sid] = m.cpu2tid[int(tmp[0])]
+		}
+		C.free(unsafe.Pointer(cstr))
+	}
+
+	cpuData := topo.CpuData()
+	m.tid2core = make(map[int]int, len(cpuData))
+	m.tid2socket = make(map[int]int, len(cpuData))
+	for i := range cpuData {
+		c := &cpuData[i]
+		// Hardware thread ID to core ID mapping
+		if len(c.CoreCPUsList) > 0 {
+			m.tid2core[c.CpuID] = c.CoreCPUsList[0]
+		} else {
+			m.tid2core[c.CpuID] = c.CpuID
+		}
+		// Hardware thead ID to socket ID mapping
+		m.tid2socket[c.CpuID] = c.Socket
+	}
+
+	m.basefreq = getBaseFreq()
 	m.init = true
 	return nil
 }

 // take a measurement for 'interval' seconds of event set index 'group'
-func (m *LikwidCollector) takeMeasurement(evset LikwidEventsetConfig, interval time.Duration) (bool, error) {
+func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig, interval time.Duration) (bool, error) {
 	var ret C.int
-	m.lock.Lock()
-	if m.initialized {
-		ret = C.perfmon_setupCounters(evset.gid)
-		if ret != 0 {
-			var err error = nil
-			var skip bool = false
-			if ret == -37 {
-				skip = true
-			} else {
-				err = fmt.Errorf("failed to setup performance group %d", evset.gid)
-			}
-			m.lock.Unlock()
-			return skip, err
+	var gid C.int = -1
+	sigchan := make(chan os.Signal, 1)
+
+	// Watch changes for the lock file ()
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		cclog.ComponentError(m.name, err.Error())
+		return true, err
+	}
+	defer watcher.Close()
+	if len(m.config.LockfilePath) > 0 {
+		info, err := os.Stat(m.config.LockfilePath)
+		if err != nil {
+			return true, err
 		}
-		ret = C.perfmon_startCounters()
-		if ret != 0 {
-			var err error = nil
-			var skip bool = false
-			if ret == -37 {
-				skip = true
+		uid := info.Sys().(*syscall.Stat_t).Uid
+		if uid != uint32(os.Getuid()) {
+			usr, err := user.LookupId(fmt.Sprint(uid))
+			if err == nil {
+				return true, fmt.Errorf("Access to performance counters locked by %s", usr.Username)
 			} else {
-				err = fmt.Errorf("failed to setup performance group %d", evset.gid)
+				return true, fmt.Errorf("Access to performance counters locked by %d", uid)
 			}
-			m.lock.Unlock()
-			return skip, err
 		}
-		m.running = true
-		time.Sleep(interval)
-		m.running = false
-		ret = C.perfmon_stopCounters()
-		if ret != 0 {
-			var err error = nil
-			var skip bool = false
-			if ret == -37 {
-				skip = true
-			} else {
-				err = fmt.Errorf("failed to setup performance group %d", evset.gid)
-			}
-			m.lock.Unlock()
-			return skip, err
+		err = watcher.Add(m.config.LockfilePath)
+		if err != nil {
+			cclog.ComponentError(m.name, err.Error())
 		}
 	}
-	m.lock.Unlock()
+	m.lock.Lock()
+	defer m.lock.Unlock()
+
+	// Initialize the performance monitoring feature by creating basic data structures
+	select {
+	case e := <-watcher.Events:
+		ret = -1
+		if e.Op != fsnotify.Chmod {
+			ret = C.perfmon_init(C.int(len(m.cpulist)), &m.cpulist[0])
+		}
+	default:
+		ret = C.perfmon_init(C.int(len(m.cpulist)), &m.cpulist[0])
+	}
+	if ret != 0 {
+		return true, fmt.Errorf("failed to initialize library, error %d", ret)
+	}
+	signal.Notify(sigchan, os.Interrupt)
+	signal.Notify(sigchan, syscall.SIGCHLD)
+
+	// Add an event string to LIKWID
+	select {
+	case <-sigchan:
+		gid = -1
+	case e := <-watcher.Events:
+		gid = -1
+		if e.Op != fsnotify.Chmod {
+			gid = C.perfmon_addEventSet(evset.estr)
+		}
+	default:
+		gid = C.perfmon_addEventSet(evset.estr)
+	}
+	if gid < 0 {
+		return true, fmt.Errorf("failed to add events %s, error %d", evset.go_estr, gid)
+	} else {
+		evset.gid = gid
+	}
+
+	// Setup all performance monitoring counters of an eventSet
+	select {
+	case <-sigchan:
+		ret = -1
+	case e := <-watcher.Events:
+		if e.Op != fsnotify.Chmod {
+			ret = C.perfmon_setupCounters(gid)
+		}
+	default:
+		ret = C.perfmon_setupCounters(gid)
+	}
+	if ret != 0 {
+		return true, fmt.Errorf("failed to setup events '%s', error %d", evset.go_estr, ret)
+	}
+
+	// Start counters
+	select {
+	case <-sigchan:
+		ret = -1
+	case e := <-watcher.Events:
+		if e.Op != fsnotify.Chmod {
+			ret = C.perfmon_startCounters()
+		}
+	default:
+		ret = C.perfmon_startCounters()
+	}
+	if ret != 0 {
+		return true, fmt.Errorf("failed to start events '%s', error %d", evset.go_estr, ret)
+	}
+	select {
+	case <-sigchan:
+		ret = -1
+	case e := <-watcher.Events:
+		if e.Op != fsnotify.Chmod {
+			ret = C.perfmon_readCounters()
+		}
+	default:
+		ret = C.perfmon_readCounters()
+	}
+	if ret != 0 {
+		return true, fmt.Errorf("failed to read events '%s', error %d", evset.go_estr, ret)
+	}
+
+	// Wait
+	time.Sleep(interval)
+
+	// Read counters
+	select {
+	case <-sigchan:
+		ret = -1
+	case e := <-watcher.Events:
+		if e.Op != fsnotify.Chmod {
+			ret = C.perfmon_readCounters()
+		}
+	default:
+		ret = C.perfmon_readCounters()
+	}
+	if ret != 0 {
+		return true, fmt.Errorf("failed to read events '%s', error %d", evset.go_estr, ret)
+	}
+
+	// Store counters
+	for eidx, counter := range evset.eorder {
+		gctr := C.GoString(counter)
+		for _, tid := range m.cpu2tid {
+			res := C.perfmon_getLastResult(gid, C.int(eidx), C.int(tid))
+			fres := float64(res)
+			if m.config.InvalidToZero && (math.IsNaN(fres) || math.IsInf(fres, 0)) {
+				fres = 0.0
+			}
+			evset.results[tid][gctr] = fres
+		}
+	}
+
+	// Store time in seconds the event group was measured the last time
+	for _, tid := range m.cpu2tid {
+		evset.results[tid]["time"] = float64(C.perfmon_getLastTimeOfGroup(gid))
+	}
+
+	// Stop counters
+	select {
+	case <-sigchan:
+		ret = -1
+	case e := <-watcher.Events:
+		if e.Op != fsnotify.Chmod {
+			ret = C.perfmon_stopCounters()
+		}
+	default:
+		ret = C.perfmon_stopCounters()
+	}
+	if ret != 0 {
+		return true, fmt.Errorf("failed to stop events '%s', error %d", evset.go_estr, ret)
+	}
+
+	// Deallocates all internal data that is used during performance monitoring
+	signal.Stop(sigchan)
+	select {
+	case e := <-watcher.Events:
+		if e.Op != fsnotify.Chmod {
+			C.perfmon_finalize()
+		}
+	default:
+		C.perfmon_finalize()
+	}
 	return false, nil
 }

@@ -325,19 +540,8 @@ func (m *LikwidCollector) takeMeasurement(evset LikwidEventsetConfig, interval t
 func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interval time.Duration, output chan lp.CCMetric) error {
 	invClock := float64(1.0 / m.basefreq)

-	// Go over events and get the results
-	for eidx, counter := range evset.eorder {
-		gctr := C.GoString(counter)
-		for _, tid := range m.cpu2tid {
-			res := C.perfmon_getLastResult(evset.gid, C.int(eidx), C.int(tid))
-			fres := float64(res)
-			if m.config.InvalidToZero && (math.IsNaN(fres) || math.IsInf(fres, 0)) {
-				fres = 0.0
-			}
-			evset.results[tid][gctr] = fres
-			evset.results[tid]["time"] = interval.Seconds()
-			evset.results[tid]["inverseClock"] = invClock
-		}
+	for _, tid := range m.cpu2tid {
+		evset.results[tid]["inverseClock"] = invClock
 	}

 	// Go over the event set metrics, derive the value out of the event:counter values and send it
@@ -348,6 +552,9 @@ func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interv
 		if metric.Type == "socket" {
 			scopemap = m.sock2tid
 		}
+		// Send all metrics with same time stamp
+		// This function does only computiation, counter measurement is done before
+		now := time.Now()
 		for domain, tid := range scopemap {
 			if tid >= 0 && len(metric.Calc) > 0 {
 				value, err := agg.EvalFloat64Condition(metric.Calc, evset.results[tid])
@@ -360,31 +567,151 @@ func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interv
 				}
 				evset.metrics[tid][metric.Name] = value
 				// Now we have the result, send it with the proper tags
-				if !math.IsNaN(value) {
-					if metric.Publish {
-						fields := map[string]interface{}{"value": value}
-						y, err := lp.New(metric.Name, map[string]string{"type": metric.Type}, m.meta, fields, time.Now())
-						if err == nil {
-							if metric.Type != "node" {
-								y.AddTag("type-id", fmt.Sprintf("%d", domain))
-							}
-							if len(metric.Unit) > 0 {
-								y.AddMeta("unit", metric.Unit)
-							}
-							output <- y
+				if !math.IsNaN(value) && metric.Publish {
+					fields := map[string]interface{}{"value": value}
+					y, err :=
+						lp.New(
+							metric.Name,
+							map[string]string{
+								"type": metric.Type,
+							},
+							m.meta,
+							fields,
+							now,
+						)
+					if err == nil {
+						if metric.Type != "node" {
+							y.AddTag("type-id", fmt.Sprintf("%d", domain))
 						}
+						if len(metric.Unit) > 0 {
+							y.AddMeta("unit", metric.Unit)
+						}
+						output <- y
 					}
 				}
 			}
 		}
+
+		// Send per core aggregated values
+		if metric.SendCoreTotalVal {
+			totalCoreValues := make(map[int]float64)
+			for _, tid := range scopemap {
+				if tid >= 0 && len(metric.Calc) > 0 {
+					coreID := m.tid2core[tid]
+					value := evset.metrics[tid][metric.Name]
+					if !math.IsNaN(value) && metric.Publish {
+						totalCoreValues[coreID] += value
+					}
+				}
+			}
+
+			for coreID, value := range totalCoreValues {
+				y, err :=
+					lp.New(
+						metric.Name,
+						map[string]string{
+							"type":    "core",
+							"type-id": fmt.Sprintf("%d", coreID),
+						},
+						m.meta,
+						map[string]interface{}{
+							"value": value,
+						},
+						now,
+					)
+				if err != nil {
+					continue
+				}
+				if len(metric.Unit) > 0 {
+					y.AddMeta("unit", metric.Unit)
+				}
+				output <- y
+			}
+		}
+
+		// Send per socket aggregated values
+		if metric.SendSocketTotalVal {
+			totalSocketValues := make(map[int]float64)
+			for _, tid := range scopemap {
+				if tid >= 0 && len(metric.Calc) > 0 {
+					socketID := m.tid2socket[tid]
+					value := evset.metrics[tid][metric.Name]
+					if !math.IsNaN(value) && metric.Publish {
+						totalSocketValues[socketID] += value
+					}
+				}
+			}
+
+			for socketID, value := range totalSocketValues {
+				y, err :=
+					lp.New(
+						metric.Name,
+						map[string]string{
+							"type":    "socket",
+							"type-id": fmt.Sprintf("%d", socketID),
+						},
+						m.meta,
+						map[string]interface{}{
+							"value": value,
+						},
+						now,
+					)
+				if err != nil {
+					continue
+				}
+				if len(metric.Unit) > 0 {
+					y.AddMeta("unit", metric.Unit)
+				}
+				output <- y
+			}
+		}
+
+		// Send per node aggregated value
+		if metric.SendNodeTotalVal {
+			var totalNodeValue float64 = 0.0
+			for _, tid := range scopemap {
+				if tid >= 0 && len(metric.Calc) > 0 {
+					value := evset.metrics[tid][metric.Name]
+					if !math.IsNaN(value) && metric.Publish {
+						totalNodeValue += value
+					}
+				}
+			}
+
+			y, err :=
+				lp.New(
+					metric.Name,
+					map[string]string{
+						"type": "node",
+					},
+					m.meta,
+					map[string]interface{}{
+						"value": totalNodeValue,
+					},
+					now,
+				)
+			if err != nil {
+				continue
+			}
+			if len(metric.Unit) > 0 {
+				y.AddMeta("unit", metric.Unit)
+			}
+			output <- y
+		}
 	}

 	return nil
 }

 // Go over the global metrics, derive the value out of the event sets' metric values and send it
-func (m *LikwidCollector) calcGlobalMetrics(interval time.Duration, output chan lp.CCMetric) error {
+func (m *LikwidCollector) calcGlobalMetrics(groups []LikwidEventsetConfig, interval time.Duration, output chan lp.CCMetric) error {
+	// Send all metrics with same time stamp
+	// This function does only computiation, counter measurement is done before
+	now := time.Now()
+
 	for _, metric := range m.config.Metrics {
+		// The metric scope is determined in the Init() function
+		// Get the map scope-id -> tids
 		scopemap := m.cpu2tid
 		if metric.Type == "socket" {
 			scopemap = m.sock2tid
@@ -392,8 +719,8 @@ func (m *LikwidCollector) calcGlobalMetrics(interval time.Duration, output chan
 		for domain, tid := range scopemap {
 			if tid >= 0 {
 				// Here we generate parameter list
-				params := make(map[string]interface{})
-				for _, evset := range m.likwidGroups {
+				params := make(map[string]float64)
+				for _, evset := range groups {
 					for mname, mres := range evset.metrics[tid] {
 						params[mname] = mres
 					}
@@ -407,13 +734,21 @@ func (m *LikwidCollector) calcGlobalMetrics(interval time.Duration, output chan
 				if m.config.InvalidToZero && (math.IsNaN(value) || math.IsInf(value, 0)) {
 					value = 0.0
 				}
-				m.gmresults[tid][metric.Name] = value
 				// Now we have the result, send it with the proper tags
 				if !math.IsNaN(value) {
 					if metric.Publish {
-						tags := map[string]string{"type": metric.Type}
-						fields := map[string]interface{}{"value": value}
-						y, err := lp.New(metric.Name, tags, m.meta, fields, time.Now())
+						y, err :=
+							lp.New(
+								metric.Name,
+								map[string]string{
+									"type": metric.Type,
+								},
+								m.meta,
+								map[string]interface{}{
+									"value": value,
+								},
+								now,
+							)
 						if err == nil {
 							if metric.Type != "node" {
 								y.AddTag("type-id", fmt.Sprintf("%d", domain))
@@ -431,163 +766,50 @@ func (m *LikwidCollector) calcGlobalMetrics(interval time.Duration, output chan
 	return nil
 }

-func (m *LikwidCollector) LateInit() error {
-	var ret C.int
-	if m.initialized {
-		return nil
-	}
-	switch m.config.AccessMode {
-	case "direct":
-		C.HPMmode(0)
-	case "accessdaemon":
-		if len(m.config.DaemonPath) > 0 {
-			p := os.Getenv("PATH")
-			os.Setenv("PATH", m.config.DaemonPath+":"+p)
-		}
-		C.HPMmode(1)
-	}
-	cclog.ComponentDebug(m.name, "initialize LIKWID topology")
-	ret = C.topology_init()
-	if ret != 0 {
-		err := errors.New("failed to initialize LIKWID topology")
-		cclog.ComponentError(m.name, err.Error())
-		return err
-	}
+func (m *LikwidCollector) ReadThread(interval time.Duration, output chan lp.CCMetric) {
+	var err error = nil
+	groups := make([]LikwidEventsetConfig, 0)

-	m.sock2tid = make(map[int]int)
-	tmp := make([]C.int, 1)
-	for _, sid := range topo.SocketList() {
-		cstr := C.CString(fmt.Sprintf("S%d:0", sid))
-		ret = C.cpustr_to_cpulist(cstr, &tmp[0], 1)
-		if ret > 0 {
-			m.sock2tid[sid] = m.cpu2tid[int(tmp[0])]
-		}
-		C.free(unsafe.Pointer(cstr))
-	}
-
-	m.basefreq = getBaseFreq()
-	cclog.ComponentDebug(m.name, "BaseFreq", m.basefreq)
-
-	cclog.ComponentDebug(m.name, "initialize LIKWID perfmon module")
-	ret = C.perfmon_init(C.int(len(m.cpulist)), &m.cpulist[0])
-	if ret != 0 {
-		var err error = nil
-		C.topology_finalize()
-		if ret != -22 {
-			err = errors.New("failed to initialize LIKWID perfmon")
-			cclog.ComponentError(m.name, err.Error())
-		} else {
-			err = errors.New("access to LIKWID perfmon locked")
-		}
-		return err
-	}
-
-	// While adding the events, we test the metrics whether they can be computed at all
-	for i, evset := range m.config.Eventsets {
-		var gid C.int
-		if len(evset.Events) > 0 {
-			skip := false
-			likwidGroup := genLikwidEventSet(evset)
-			for _, g := range m.likwidGroups {
-				if likwidGroup.go_estr == g.go_estr {
-					skip = true
-					break
-				}
+	for evidx, evset := range m.config.Eventsets {
+		e := genLikwidEventSet(evset)
+		e.internal = evidx
+		skip := false
+		if !skip {
+			// measure event set 'i' for 'interval' seconds
+			skip, err = m.takeMeasurement(evidx, e, interval)
+			if err != nil {
+				cclog.ComponentError(m.name, err.Error())
+				return
 			}
-			if skip {
-				continue
-			}
-			// Now we add the list of events to likwid
-			gid = C.perfmon_addEventSet(likwidGroup.estr)
-			if gid >= 0 {
-				likwidGroup.gid = gid
-				likwidGroup.internal = i
-				m.likwidGroups[gid] = likwidGroup
-			}
-		} else {
-			cclog.ComponentError(m.name, "Invalid Likwid eventset config, no events given")
-			continue
 		}

+		if !skip {
+			// read measurements and derive event set metrics
+			m.calcEventsetMetrics(e, interval, output)
+		}
+		groups = append(groups, e)
 	}
-
-	// If no event set could be added, shut down LikwidCollector
-	if len(m.likwidGroups) == 0 {
-		C.perfmon_finalize()
-		C.topology_finalize()
-		err := errors.New("no LIKWID performance group initialized")
-		cclog.ComponentError(m.name, err.Error())
-		return err
-	}
-	sigchan := make(chan os.Signal, 1)
-	signal.Notify(sigchan, syscall.SIGCHLD)
-	signal.Notify(sigchan, os.Interrupt)
-	go func() {
-		<-sigchan
-
-		signal.Stop(sigchan)
-		m.initialized = false
-	}()
-	m.initialized = true
-	return nil
+	// calculate global metrics
+	m.calcGlobalMetrics(groups, interval, output)
 }

 // main read function taking multiple measurement rounds, each 'interval' seconds long
 func (m *LikwidCollector) Read(interval time.Duration, output chan lp.CCMetric) {
-	var skip bool = false
-	var err error
 	if !m.init {
 		return
 	}
-
-	if !m.initialized {
-		m.lock.Lock()
-		err = m.LateInit()
-		if err != nil {
-			m.lock.Unlock()
-			return
-		}
-		m.initialized = true
-		m.lock.Unlock()
-	}
-
-	if m.initialized && !skip {
-		for _, evset := range m.likwidGroups {
-			if !skip {
-				// measure event set 'i' for 'interval' seconds
-				skip, err = m.takeMeasurement(evset, interval)
-				if err != nil {
-					cclog.ComponentError(m.name, err.Error())
-					return
-				}
-			}
-
-			if !skip {
-				// read measurements and derive event set metrics
-				m.calcEventsetMetrics(evset, interval, output)
-			}
-		}
-		if !skip {
-			// use the event set metrics to derive the global metrics
-			m.calcGlobalMetrics(interval, output)
-		}
-	}
+	m.measureThread.Call(func() {
+		m.ReadThread(interval, output)
+	})
 }

 func (m *LikwidCollector) Close() {
 	if m.init {
 		m.init = false
-		cclog.ComponentDebug(m.name, "Closing ...")
 		m.lock.Lock()
-		if m.initialized {
-			cclog.ComponentDebug(m.name, "Finalize LIKWID perfmon module")
-			C.perfmon_finalize()
-			m.initialized = false
-		}
+		m.measureThread.Terminate()
+		m.initialized = false
 		m.lock.Unlock()
-		cclog.ComponentDebug(m.name, "Finalize LIKWID topology module")
 		C.topology_finalize()
-
-		cclog.ComponentDebug(m.name, "Closing done")
 	}
 }
--- a/collectors/likwidMetric.md
+++ b/collectors/likwidMetric.md
@@ -10,6 +10,7 @@ The `likwid` collector is probably the most complicated collector. The LIKWID li
    "liblikwid_path" : "/path/to/liblikwid.so",
    "accessdaemon_path" : "/folder/that/contains/likwid-accessD",
    "access_mode" : "direct or accessdaemon or perf_event",
+    "lockfile_path" : "/var/run/likwid.lock",
    "eventsets": [
      {
        "events" : {
@@ -40,34 +41,39 @@ The `likwid` collector is probably the most complicated collector. The LIKWID li
 ```

 The `likwid` configuration consists of two parts, the `eventsets` and `globalmetrics`:
+
 - An event set list itself has two parts, the `events` and a set of derivable `metrics`. Each of the `events` is a `counter:event` pair in LIKWID's syntax. The `metrics` are a list of formulas to derive the metric value from the measurements of the `events`' values. Each metric has a name, the formula, a type and a publish flag. There is an optional `unit` field. Counter names can be used like variables in the formulas, so `PMC0+PMC1` sums the measurements for the both events configured in the counters `PMC0` and `PMC1`. You can optionally use `time` for the measurement time and `inverseClock` for `1.0/baseCpuFrequency`. The type tells the LikwidCollector whether it is a metric for each hardware thread (`cpu`) or each CPU socket (`socket`). You may specify a unit for the metric with `unit`. The last one is the publishing flag. It tells the LikwidCollector whether a metric should be sent to the router or is only used internally to compute a global metric.
- The `globalmetrics` are metrics which require data from multiple event set measurements to be derived. The inputs are the metrics in the event sets. Similar to the metrics in the event sets, the global metrics are defined by a name, a formula, a scope and a publish flag. See event set metrics for details. The only difference is that there is no access to the raw event measurements anymore but only to the metrics. Also `time` and `inverseClock` cannot be used anymore. So, the idea is to derive a metric in the `eventsets` section and reuse it in the `globalmetrics` part. If you need a metric only for deriving the global metrics, disable forwarding of the event set metrics (`"publish": false`). **Be aware** that the combination might be misleading because the "behavior" of a metric changes over time and the multiple measurements might count different computing phases. Similar to the metrics in the eventset, you can specify a metric unit with the `unit` field.
+- The `globalmetrics` are metrics which require data from multiple event set measurements to be derived. The inputs are the metrics in the event sets. Similar to the metrics in the event sets, the global metrics are defined by a name, a formula, a type and a publish flag. See event set metrics for details. The only difference is that there is no access to the raw event measurements anymore but only to the metrics. Also `time` and `inverseClock` cannot be used anymore. So, the idea is to derive a metric in the `eventsets` section and reuse it in the `globalmetrics` part. If you need a metric only for deriving the global metrics, disable forwarding of the event set metrics (`"publish": false`). **Be aware** that the combination might be misleading because the "behavior" of a metric changes over time and the multiple measurements might count different computing phases. Similar to the metrics in the eventset, you can specify a metric unit with the `unit` field.

 Additional options:
+
 - `force_overwrite`: Same as setting `LIKWID_FORCE=1`. In case counters are already in-use, LIKWID overwrites their configuration to do its measurements
 - `invalid_to_zero`: In some cases, the calculations result in `NaN` or `Inf`. With this option, all `NaN` and `Inf` values are replaces with `0.0`. See below in [seperate section](./likwidMetric.md#invalid_to_zero-option)
 - `access_mode`: Specify LIKWID access mode: `direct` for direct register access as root user or `accessdaemon`. The access mode `perf_event` is current untested.
 - `accessdaemon_path`: Folder of the accessDaemon `likwid-accessD` (like `/usr/local/sbin`)
 - `liblikwid_path`: Location of `liblikwid.so` including file name like `/usr/local/lib/liblikwid.so`
+- `lockfile_path`: Location of LIKWID's lock file if multiple tools should access the hardware counters. Default `/var/run/likwid.lock`

-### Available metric scopes
+### Available metric types

 Hardware performance counters are scattered all over the system nowadays. A counter coveres a specific part of the system. While there are hardware thread specific counter for CPU cycles, instructions and so on, some others are specific for a whole CPU socket/package. To address that, the LikwidCollector provides the specification of a `type` for each metric.

 - `hwthread` : One metric per CPU hardware thread with the tags `"type" : "hwthread"` and `"type-id" : "$hwthread_id"`
 - `socket` : One metric per CPU socket/package with the tags `"type" : "socket"` and `"type-id" : "$socket_id"`

-**Note:** You cannot specify `socket` scope for a metric that is measured at `hwthread` scope, so some kind of expert knowledge or lookup work in the [Likwid Wiki](https://github.com/RRZE-HPC/likwid/wiki) is required. Get the scope of each counter from the *Architecture* pages and as soon as one counter in a metric is socket-specific, the whole metric is socket-specific.
+**Note:** You cannot specify `socket` type for a metric that is measured at `hwthread` type, so some kind of expert knowledge or lookup work in the [Likwid Wiki](https://github.com/RRZE-HPC/likwid/wiki) is required. Get the type of each counter from the *Architecture* pages and as soon as one counter in a metric is socket-specific, the whole metric is socket-specific.

 As a guideline:
- All counters `FIXCx`, `PMCy` and `TMAz` have the scope `hwthread`
- All counters names containing `BOX` have the scope `socket`
- All `PWRx` counters have scope `socket`, except `"PWR1" : "RAPL_CORE_ENERGY"` has `hwthread` scope
- All `DFCx` counters have scope `socket`
+
+- All counters `FIXCx`, `PMCy` and `TMAz` have the type `hwthread`
+- All counters names containing `BOX` have the type `socket`
+- All `PWRx` counters have type `socket`, except `"PWR1" : "RAPL_CORE_ENERGY"` has `hwthread` type
+- All `DFCx` counters have type `socket`

 ### Help with the configuration

 The configuration for the `likwid` collector is quite complicated. Most users don't use LIKWID with the event:counter notation but rely on the performance groups defined by the LIKWID team for each architecture. In order to help with the `likwid` collector configuration, we included a script `scripts/likwid_perfgroup_to_cc_config.py` that creates the configuration of an `eventset` from a performance group (using a LIKWID installation in `$PATH`):
+
 ```
 $ likwid-perfctr -i
 [...]
@@ -93,7 +99,7 @@ $ scripts/likwid_perfgroup_to_cc_config.py ICX MEM_DP
      "name": "Runtime (RDTSC) [s]",
      "publish": true,
      "unit": "seconds"
-      "scope": "hwthread"
+      "type": "hwthread"
    },
    {
      "..." : "..."
@@ -109,20 +115,28 @@ You can copy this JSON and add it to the `eventsets` list. If you specify multip
 LIKWID checks the file `/var/run/likwid.lock` before performing any interfering operations. Who is allowed to access the counters is determined by the owner of the file. If it does not exist, it is created for the current user. So, if you want to temporarly allow counter access to a user (e.g. in a job):

 Before (SLURM prolog, ...)
-```
-$ chown $JOBUSER /var/run/likwid.lock
+
+```bash
+chown $JOBUSER /var/run/likwid.lock
 ```

 After (SLURM epilog, ...)
-```
-$ chown $CCUSER /var/run/likwid.lock
+
+```bash
+chown $CCUSER /var/run/likwid.lock
 ```

 ### `invalid_to_zero` option
+
 In some cases LIKWID returns `0.0` for some events that are further used in processing and maybe used as divisor in a calculation. After evaluation of a metric, the result might be `NaN` or `+-Inf`. These resulting metrics are commonly not created and forwarded to the router because the [InfluxDB line protocol](https://docs.influxdata.com/influxdb/cloud/reference/syntax/line-protocol/#float) does not support these special floating-point values. If you want to have them sent, this option forces these metric values to be `0.0` instead.

 One might think this does not happen often but often used metrics in the world of performance engineering like Instructions-per-Cycle (IPC) or more frequently the actual CPU clock are derived with events like `CPU_CLK_UNHALTED_CORE` (Intel) which do not increment in halted state (as the name implies). In there are different power management systems in a chip which can cause a hardware thread to go in such a state. Moreover, if no cycles are executed by the core, also many other events are not incremented as well (like `INSTR_RETIRED_ANY` for retired instructions and part of IPC).

+### `send_*_total values` option
+
+- `send_core_total_values`: Metrics, which are usually collected on a per hardware thread basis, are additionally summed up per CPU core.
+- `send_socket_total_values` Metrics, which are usually collected on a per hardware thread basis, are additionally summed up per CPU socket.
+- `send_node_total_values` Metrics, which are usually collected on a per hardware thread basis, are additionally summed up per node.

 ### Example configuration

@@ -227,6 +241,7 @@ One might think this does not happen often but often used metrics in the world o
 The `likwid` collector reads hardware performance counters at a **hwthread** and **socket** level. The configuration looks quite complicated but it is basically copy&paste from [LIKWID's performance groups](https://github.com/RRZE-HPC/likwid/tree/master/groups). The collector made multiple iterations and tried to use the performance groups but it lacked flexibility. The current way of configuration provides most flexibility.

 The logic is as following: There are multiple eventsets, each consisting of a list of counters+events and a list of metrics. If you compare a common performance group with the example setting above, there is not much difference:
+
 ```
 EVENTSET                         ->   "events": {
 FIXC1 ACTUAL_CPU_CLOCK           ->     "FIXC1": "ACTUAL_CPU_CLOCK",
@@ -245,7 +260,7 @@ METRICS                          ->   "metrics": [
 IPC   PMC0/PMC1                  ->     {
                                 ->       "name" : "IPC",
                                 ->       "calc" : "PMC0/PMC1",
-                                 ->       "scope": "hwthread",
+                                 ->       "type": "hwthread",
                                 ->       "publish": true
                                 ->     }
                                 ->   ]
--- a/collectors/lustreMetric.go
+++ b/collectors/lustreMetric.go
@@ -101,7 +101,7 @@ func getMetricData(lines []string, prefix string, offset int) (int64, error) {
 // 	llitedir := filepath.Join(LUSTRE_SYSFS, "llite")
 // 	devdir := filepath.Join(llitedir, device)
 // 	statsfile := filepath.Join(devdir, "stats")
-// 	buffer, err := ioutil.ReadFile(statsfile)
+// 	buffer, err := os.ReadFile(statsfile)
 // 	if err != nil {
 // 		return make([]string, 0)
 // 	}
--- a/collectors/netstatMetric.go
+++ b/collectors/netstatMetric.go
@@ -102,7 +102,7 @@ func (m *NetstatCollector) Init(config json.RawMessage) error {

 		// Check if device is a included device
 		if _, ok := stringArrayContains(m.config.IncludeDevices, dev); ok {
-			tags := map[string]string{"device": dev, "type": "node"}
+			tags := map[string]string{"stype": "network", "stype-id": dev, "type": "node"}
 			meta_unit_byte := map[string]string{"source": m.name, "group": "Network", "unit": "bytes"}
 			meta_unit_byte_per_sec := map[string]string{"source": m.name, "group": "Network", "unit": "bytes/sec"}
 			meta_unit_pkts := map[string]string{"source": m.name, "group": "Network", "unit": "packets"}
--- a/collectors/netstatMetric.md
+++ b/collectors/netstatMetric.md
@@ -23,5 +23,5 @@ Metrics:
 * `net_pkts_in_bw` (`unit=packets/sec` if `send_derived_values == true`)
 * `net_pkts_out_bw` (`unit=packets/sec` if `send_derived_values == true`)

-The device name is added as tag `device`.
+The device name is added as tag `stype=network,stype-id=<device>`.

--- a/collectors/nfsiostatMetric.go
+++ b/collectors/nfsiostatMetric.go
@@ -0,0 +1,166 @@
+package collectors
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+)
+
+// These are the fields we read from the JSON configuration
+type NfsIOStatCollectorConfig struct {
+	ExcludeMetrics          []string `json:"exclude_metrics,omitempty"`
+	ExcludeFilesystem       []string `json:"exclude_filesystem,omitempty"`
+	UseServerAddressAsSType bool     `json:"use_server_as_stype,omitempty"`
+}
+
+// This contains all variables we need during execution and the variables
+// defined by metricCollector (name, init, ...)
+type NfsIOStatCollector struct {
+	metricCollector
+	config NfsIOStatCollectorConfig    // the configuration structure
+	meta   map[string]string           // default meta information
+	tags   map[string]string           // default tags
+	data   map[string]map[string]int64 // data storage for difference calculation
+	key    string                      // which device info should be used as subtype ID? 'server' or 'mntpoint', see NfsIOStatCollectorConfig.UseServerAddressAsSType
+}
+
+var deviceRegex = regexp.MustCompile(`device (?P<server>[^ ]+) mounted on (?P<mntpoint>[^ ]+) with fstype nfs(?P<version>\d*) statvers=[\d\.]+`)
+var bytesRegex = regexp.MustCompile(`\s+bytes:\s+(?P<nread>[^ ]+) (?P<nwrite>[^ ]+) (?P<dread>[^ ]+) (?P<dwrite>[^ ]+) (?P<nfsread>[^ ]+) (?P<nfswrite>[^ ]+) (?P<pageread>[^ ]+) (?P<pagewrite>[^ ]+)`)
+
+func resolve_regex_fields(s string, regex *regexp.Regexp) map[string]string {
+	fields := make(map[string]string)
+	groups := regex.SubexpNames()
+	for _, match := range regex.FindAllStringSubmatch(s, -1) {
+		for groupIdx, group := range match {
+			if len(groups[groupIdx]) > 0 {
+				fields[groups[groupIdx]] = group
+			}
+		}
+	}
+	return fields
+}
+
+func (m *NfsIOStatCollector) readNfsiostats() map[string]map[string]int64 {
+	data := make(map[string]map[string]int64)
+	filename := "/proc/self/mountstats"
+	stats, err := os.ReadFile(filename)
+	if err != nil {
+		return data
+	}
+
+	lines := strings.Split(string(stats), "\n")
+	var current map[string]string = nil
+	for _, l := range lines {
+		// Is this a device line with mount point, remote target and NFS version?
+		dev := resolve_regex_fields(l, deviceRegex)
+		if len(dev) > 0 {
+			if _, ok := stringArrayContains(m.config.ExcludeFilesystem, dev[m.key]); !ok {
+				current = dev
+				if len(current["version"]) == 0 {
+					current["version"] = "3"
+				}
+			}
+		}
+
+		if len(current) > 0 {
+			// Byte line parsing (if found the device for it)
+			bytes := resolve_regex_fields(l, bytesRegex)
+			if len(bytes) > 0 {
+				data[current[m.key]] = make(map[string]int64)
+				for name, sval := range bytes {
+					if _, ok := stringArrayContains(m.config.ExcludeMetrics, name); !ok {
+						val, err := strconv.ParseInt(sval, 10, 64)
+						if err == nil {
+							data[current[m.key]][name] = val
+						}
+					}
+
+				}
+				current = nil
+			}
+		}
+	}
+	return data
+}
+
+func (m *NfsIOStatCollector) Init(config json.RawMessage) error {
+	var err error = nil
+	m.name = "NfsIOStatCollector"
+	m.setup()
+	m.parallel = true
+	m.meta = map[string]string{"source": m.name, "group": "NFS", "unit": "bytes"}
+	m.tags = map[string]string{"type": "node"}
+	m.config.UseServerAddressAsSType = false
+	if len(config) > 0 {
+		err = json.Unmarshal(config, &m.config)
+		if err != nil {
+			cclog.ComponentError(m.name, "Error reading config:", err.Error())
+			return err
+		}
+	}
+	m.key = "mntpoint"
+	if m.config.UseServerAddressAsSType {
+		m.key = "server"
+	}
+	m.data = m.readNfsiostats()
+	m.init = true
+	return err
+}
+
+func (m *NfsIOStatCollector) Read(interval time.Duration, output chan lp.CCMetric) {
+	timestamp := time.Now()
+
+	// Get the current values for all mountpoints
+	newdata := m.readNfsiostats()
+
+	for mntpoint, values := range newdata {
+		// Was the mount point already present in the last iteration
+		if old, ok := m.data[mntpoint]; ok {
+			// Calculate the difference of old and new values
+			for i := range values {
+				x := values[i] - old[i]
+				y, err := lp.New(fmt.Sprintf("nfsio_%s", i), m.tags, m.meta, map[string]interface{}{"value": x}, timestamp)
+				if err == nil {
+					if strings.HasPrefix(i, "page") {
+						y.AddMeta("unit", "4K_Pages")
+					}
+					y.AddTag("stype", "filesystem")
+					y.AddTag("stype-id", mntpoint)
+					// Send it to output channel
+					output <- y
+				}
+				// Update old to the new value for the next iteration
+				old[i] = values[i]
+			}
+		} else {
+			// First time we see this mount point, store all values
+			m.data[mntpoint] = values
+		}
+	}
+	// Reset entries that do not exist anymore
+	for mntpoint := range m.data {
+		found := false
+		for new := range newdata {
+			if new == mntpoint {
+				found = true
+				break
+			}
+		}
+		if !found {
+			m.data[mntpoint] = nil
+		}
+	}
+
+}
+
+func (m *NfsIOStatCollector) Close() {
+	// Unset flag
+	m.init = false
+}
--- a/collectors/nfsiostatMetric.md
+++ b/collectors/nfsiostatMetric.md
@@ -0,0 +1,27 @@
+## `nfsiostat` collector
+
+```json
+  "nfsiostat": {
+    "exclude_metrics": [
+      "nfsio_oread"
+    ],
+    "exclude_filesystems" : [
+        "/mnt",
+    ],
+    "use_server_as_stype": false
+  }
+```
+
+The `nfsiostat` collector reads data from `/proc/self/mountstats` and outputs a handful **node** metrics for each NFS filesystem. If a metric or filesystem is not required, it can be excluded from forwarding it to the sink.
+
+Metrics:
+* `nfsio_nread`: Bytes transferred by normal `read()` calls
+* `nfsio_nwrite`: Bytes transferred by normal `write()` calls
+* `nfsio_oread`: Bytes transferred by `read()` calls with `O_DIRECT`
+* `nfsio_owrite`: Bytes transferred by `write()` calls with `O_DIRECT`
+* `nfsio_pageread`: Pages transferred by `read()` calls
+* `nfsio_pagewrite`: Pages transferred by `write()` calls
+* `nfsio_nfsread`: Bytes transferred for reading from the server
+* `nfsio_nfswrite`: Pages transferred by writing to the server
+
+The `nfsiostat` collector adds the mountpoint to the tags as `stype=filesystem,stype-id=<mountpoint>`. If the server address should be used instead of the mountpoint, use the `use_server_as_stype` config setting.
--- a/collectors/nvidiaMetric.go
+++ b/collectors/nvidiaMetric.go
@@ -71,6 +71,14 @@ func (m *NvidiaCollector) Init(config json.RawMessage) error {

 	// Initialize NVIDIA Management Library (NVML)
 	ret := nvml.Init()
+
+	// Error: NVML library not found
+	// (nvml.ErrorString can not be used in this case)
+	if ret == nvml.ERROR_LIBRARY_NOT_FOUND {
+		err = fmt.Errorf("NVML library not found")
+		cclog.ComponentError(m.name, err.Error())
+		return err
+	}
 	if ret != nvml.SUCCESS {
 		err = errors.New(nvml.ErrorString(ret))
 		cclog.ComponentError(m.name, "Unable to initialize NVML", err.Error())
--- a/docs/building.md
+++ b/docs/building.md
@@ -37,7 +37,9 @@ $ install --mode 644  \
 $ systemctl enable cc-metric-collector
 ```

-## RPM
+## Packaging
+
+### RPM

 In order to get a RPM packages for cc-metric-collector, just use:

@@ -47,7 +49,7 @@ $ make RPM

 It uses the RPM SPEC file `scripts/cc-metric-collector.spec` and requires the RPM tools (`rpm` and `rpmspec`) and `git`.

-## DEB
+### DEB

 In order to get very simple Debian packages for cc-metric-collector, just use:

@@ -57,4 +59,16 @@ $ make DEB

 It uses the DEB control file `scripts/cc-metric-collector.control` and requires `dpkg-deb`, `awk`, `sed` and `git`. It creates only a binary deb package.

-_This option is not well tested and therefore experimental_
+_This option is not well tested and therefore experimental_
+
+### Customizing RPMs or DEB packages
+
+If you want to customize the RPMs or DEB packages for your local system, use the following workflow.
+
+- (if there is already a fork in the private account, delete it and wait until Github realizes the deletion)
+- Fork the cc-metric-collector repository (if Github hasn't realized it, it creates a fork named cc-metric-collector2)
+- Go to private cc-metric-collector repository and enable Github Actions
+- Do changes to the scripts, code, ... Commit and push your changes.
+- Tag the new commit with `v0.x.y-<myversion>` (`git tag v0.x.y-<myversion>`)
+- Push tags to repository (`git push --tags`)
+- Wait until the Release action finishes. It creates fresh RPMs and DEBs in your private repository on the Releases page.
--- a/go.mod
+++ b/go.mod
@@ -1,40 +1,41 @@
 module github.com/ClusterCockpit/cc-metric-collector

-go 1.18
+go 1.21

 require (
-	github.com/ClusterCockpit/cc-units v0.3.0
+	github.com/ClusterCockpit/cc-units v0.4.0
 	github.com/ClusterCockpit/go-rocm-smi v0.3.0
-	github.com/NVIDIA/go-nvml v0.11.6-0
-	github.com/PaesslerAG/gval v1.2.1
-	github.com/gorilla/mux v1.8.0
-	github.com/influxdata/influxdb-client-go/v2 v2.12.0
+	github.com/NVIDIA/go-nvml v0.12.0-2
+	github.com/PaesslerAG/gval v1.2.2
+	github.com/fsnotify/fsnotify v1.7.0
+	github.com/gorilla/mux v1.8.1
+	github.com/influxdata/influxdb-client-go/v2 v2.13.0
 	github.com/influxdata/line-protocol v0.0.0-20210922203350-b1ad95c89adf
-	github.com/nats-io/nats.go v1.20.0
-	github.com/prometheus/client_golang v1.14.0
-	github.com/stmcginnis/gofish v0.13.0
-	github.com/tklauser/go-sysconf v0.3.11
-	golang.org/x/sys v0.2.0
+	github.com/influxdata/line-protocol/v2 v2.2.1
+	github.com/nats-io/nats.go v1.33.1
+	github.com/prometheus/client_golang v1.19.0
+	github.com/stmcginnis/gofish v0.15.0
+	github.com/tklauser/go-sysconf v0.3.13
+	golang.design/x/thread v0.0.0-20210122121316-335e9adffdf1
+	golang.org/x/exp v0.0.0-20240222234643-814bf88cf225
+	golang.org/x/sys v0.18.0
 )

 require (
 	github.com/apapsch/go-jsonmerge/v2 v2.0.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.2 // indirect
-	github.com/deepmap/oapi-codegen v1.12.3 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/google/uuid v1.3.0 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
-	github.com/nats-io/nats-server/v2 v2.8.4 // indirect
-	github.com/nats-io/nkeys v0.3.0 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/compress v1.17.7 // indirect
+	github.com/nats-io/nkeys v0.4.7 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
-	github.com/prometheus/client_model v0.3.0 // indirect
-	github.com/prometheus/common v0.37.0 // indirect
-	github.com/prometheus/procfs v0.8.0 // indirect
+	github.com/oapi-codegen/runtime v1.1.1 // indirect
+	github.com/prometheus/client_model v0.6.0 // indirect
+	github.com/prometheus/common v0.49.0 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
 	github.com/shopspring/decimal v1.3.1 // indirect
-	github.com/tklauser/numcpus v0.6.0 // indirect
-	golang.org/x/crypto v0.3.0 // indirect
-	golang.org/x/net v0.2.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	github.com/tklauser/numcpus v0.7.0 // indirect
+	golang.org/x/crypto v0.21.0 // indirect
+	golang.org/x/net v0.22.0 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
 )
--- a/go.sum
+++ b/go.sum
@@ -1,624 +1,102 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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-google.golang.org/genproto v0.0.0-20200228133532-8c2c7df3a383/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
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-google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
-google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
-google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
-google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
-google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
-google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
-google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
-google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
-google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
-google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
-google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
-google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
-google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
-google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
-gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
+google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
-gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
-honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
--- a/internal/metricAggregator/metricAggregator.go
+++ b/internal/metricAggregator/metricAggregator.go
@@ -121,7 +121,12 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 	vars["endtime"] = endtime
 	for _, f := range c.functions {
 		cclog.ComponentDebug("MetricCache", "COLLECT", f.Name, "COND", f.Condition)
-		values := make([]float64, 0)
+		var valuesFloat64 []float64
+		var valuesFloat32 []float32
+		var valuesInt []int
+		var valuesInt32 []int32
+		var valuesInt64 []int64
+		var valuesBool []bool
 		matches := make([]lp.CCMetric, 0)
 		for _, m := range metrics {
 			vars["metric"] = m
@@ -136,17 +141,17 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 				if valid {
 					switch x := v.(type) {
 					case float64:
-						values = append(values, x)
+						valuesFloat64 = append(valuesFloat64, x)
 					case float32:
+						valuesFloat32 = append(valuesFloat32, x)
 					case int:
+						valuesInt = append(valuesInt, x)
+					case int32:
+						valuesInt32 = append(valuesInt32, x)
 					case int64:
-						values = append(values, float64(x))
+						valuesInt64 = append(valuesInt64, x)
 					case bool:
-						if x {
-							values = append(values, float64(1.0))
-						} else {
-							values = append(values, float64(0.0))
-						}
+						valuesBool = append(valuesBool, x)
 					default:
 						cclog.ComponentError("MetricCache", "COLLECT ADD VALUE", v, "FAILED")
 					}
@@ -155,13 +160,59 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 			}
 		}
 		delete(vars, "metric")
-		cclog.ComponentDebug("MetricCache", "EVALUATE", f.Name, "METRICS", len(values), "CALC", f.Function)
-		vars["values"] = values
+
+		// Check, that only values of one type were collected
+		countValueTypes := 0
+		if len(valuesFloat64) > 0 {
+			countValueTypes += 1
+		}
+		if len(valuesFloat32) > 0 {
+			countValueTypes += 1
+		}
+		if len(valuesInt) > 0 {
+			countValueTypes += 1
+		}
+		if len(valuesInt32) > 0 {
+			countValueTypes += 1
+		}
+		if len(valuesInt64) > 0 {
+			countValueTypes += 1
+		}
+		if len(valuesBool) > 0 {
+			countValueTypes += 1
+		}
+		if countValueTypes > 1 {
+			cclog.ComponentError("MetricCache", "Collected values of different types")
+		}
+
+		var len_values int
+		switch {
+		case len(valuesFloat64) > 0:
+			vars["values"] = valuesFloat64
+			len_values = len(valuesFloat64)
+		case len(valuesFloat32) > 0:
+			vars["values"] = valuesFloat32
+			len_values = len(valuesFloat32)
+		case len(valuesInt) > 0:
+			vars["values"] = valuesInt
+			len_values = len(valuesInt)
+		case len(valuesInt32) > 0:
+			vars["values"] = valuesInt32
+			len_values = len(valuesInt32)
+		case len(valuesInt64) > 0:
+			vars["values"] = valuesInt64
+			len_values = len(valuesInt64)
+		case len(valuesBool) > 0:
+			vars["values"] = valuesBool
+			len_values = len(valuesBool)
+		}
+		cclog.ComponentDebug("MetricCache", "EVALUATE", f.Name, "METRICS", len_values, "CALC", f.Function)
+
 		vars["metrics"] = matches
-		if len(values) > 0 {
+		if len_values > 0 {
 			value, err := gval.Evaluate(f.Function, vars, c.language)
 			if err != nil {
-				cclog.ComponentError("MetricCache", "EVALUATE", f.Name, "METRICS", len(values), "CALC", f.Function, ":", err.Error())
+				cclog.ComponentError("MetricCache", "EVALUATE", f.Name, "METRICS", len_values, "CALC", f.Function, ":", err.Error())
 				break
 			}

@@ -316,7 +367,7 @@ func EvalBoolCondition(condition string, params map[string]interface{}) (bool, e
 	return value, err
 }

-func EvalFloat64Condition(condition string, params map[string]interface{}) (float64, error) {
+func EvalFloat64Condition(condition string, params map[string]float64) (float64, error) {
 	evaluables.mutex.Lock()
 	evaluable, ok := evaluables.mapping[condition]
 	evaluables.mutex.Unlock()
--- a/internal/metricAggregator/metricAggregatorFunctions.go
+++ b/internal/metricAggregator/metricAggregatorFunctions.go
@@ -3,12 +3,11 @@ package metricAggregator
 import (
 	"errors"
 	"fmt"
-	"math"
 	"regexp"
-	"sort"
 	"strings"

-	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	"golang.org/x/exp/slices"
+
 	topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 )

@@ -16,149 +15,155 @@ import (
 * Arithmetic functions on value arrays
 */

-// Sum up values
-func sumfunc(args ...interface{}) (interface{}, error) {
-	s := 0.0
-	values, ok := args[0].([]float64)
-	if ok {
-		cclog.ComponentDebug("MetricCache", "SUM FUNC START")
-		for _, x := range values {
-			s += x
-		}
-		cclog.ComponentDebug("MetricCache", "SUM FUNC END", s)
-	} else {
-		cclog.ComponentDebug("MetricCache", "SUM FUNC CAST FAILED")
+func sumAnyType[T float64 | float32 | int | int32 | int64](values []T) (T, error) {
+	if len(values) == 0 {
+		return 0.0, errors.New("sum function requires at least one argument")
 	}
-	return s, nil
+	var sum T
+	for _, value := range values {
+		sum += value
+	}
+	return sum, nil
 }

-// Get the minimum value
-func minfunc(args ...interface{}) (interface{}, error) {
-	var err error = nil
-	switch values := args[0].(type) {
+// Sum up values
+func sumfunc(args interface{}) (interface{}, error) {
+
+	var err error
+	switch values := args.(type) {
 	case []float64:
-		var s float64 = math.MaxFloat64
-		for _, x := range values {
-			if x < s {
-				s = x
-			}
-		}
-		return s, nil
+		return sumAnyType(values)
 	case []float32:
-		var s float32 = math.MaxFloat32
-		for _, x := range values {
-			if x < s {
-				s = x
-			}
-		}
-		return s, nil
+		return sumAnyType(values)
 	case []int:
-		var s int = int(math.MaxInt32)
-		for _, x := range values {
-			if x < s {
-				s = x
-			}
-		}
-		return s, nil
+		return sumAnyType(values)
 	case []int64:
-		var s int64 = math.MaxInt64
-		for _, x := range values {
-			if x < s {
-				s = x
-			}
-		}
-		return s, nil
+		return sumAnyType(values)
 	case []int32:
-		var s int32 = math.MaxInt32
-		for _, x := range values {
-			if x < s {
-				s = x
-			}
-		}
-		return s, nil
+		return sumAnyType(values)
 	default:
-		err = errors.New("function 'min' only on list of values (float64, float32, int, int32, int64)")
+		err = errors.New("function 'sum' only on list of values (float64, float32, int, int32, int64)")
 	}

 	return 0.0, err
 }

-// Get the average or mean value
-func avgfunc(args ...interface{}) (interface{}, error) {
-	switch values := args[0].(type) {
-	case []float64:
-		var s float64 = 0
-		for _, x := range values {
-			s += x
-		}
-		return s / float64(len(values)), nil
-	case []float32:
-		var s float32 = 0
-		for _, x := range values {
-			s += x
-		}
-		return s / float32(len(values)), nil
-	case []int:
-		var s int = 0
-		for _, x := range values {
-			s += x
-		}
-		return s / len(values), nil
-	case []int64:
-		var s int64 = 0
-		for _, x := range values {
-			s += x
-		}
-		return s / int64(len(values)), nil
+func minAnyType[T float64 | float32 | int | int32 | int64](values []T) (T, error) {
+	if len(values) == 0 {
+		return 0.0, errors.New("min function requires at least one argument")
 	}
-	return 0.0, nil
+	return slices.Min(values), nil
+}
+
+// Get the minimum value
+func minfunc(args interface{}) (interface{}, error) {
+	switch values := args.(type) {
+	case []float64:
+		return minAnyType(values)
+	case []float32:
+		return minAnyType(values)
+	case []int:
+		return minAnyType(values)
+	case []int64:
+		return minAnyType(values)
+	case []int32:
+		return minAnyType(values)
+	default:
+		return 0.0, errors.New("function 'min' only on list of values (float64, float32, int, int32, int64)")
+	}
+}
+
+func avgAnyType[T float64 | float32 | int | int32 | int64](values []T) (float64, error) {
+	if len(values) == 0 {
+		return 0.0, errors.New("average function requires at least one argument")
+	}
+	sum, err := sumAnyType[T](values)
+	return float64(sum) / float64(len(values)), err
+}
+
+// Get the average or mean value
+func avgfunc(args interface{}) (interface{}, error) {
+	switch values := args.(type) {
+	case []float64:
+		return avgAnyType(values)
+	case []float32:
+		return avgAnyType(values)
+	case []int:
+		return avgAnyType(values)
+	case []int64:
+		return avgAnyType(values)
+	case []int32:
+		return avgAnyType(values)
+	default:
+		return 0.0, errors.New("function 'average' only on list of values (float64, float32, int, int32, int64)")
+	}
+}
+
+func maxAnyType[T float64 | float32 | int | int32 | int64](values []T) (T, error) {
+	if len(values) == 0 {
+		return 0.0, errors.New("max function requires at least one argument")
+	}
+	return slices.Max(values), nil
 }

 // Get the maximum value
-func maxfunc(args ...interface{}) (interface{}, error) {
-	s := 0.0
-	values, ok := args[0].([]float64)
-	if ok {
-		for _, x := range values {
-			if x > s {
-				s = x
-			}
-		}
+func maxfunc(args interface{}) (interface{}, error) {
+	switch values := args.(type) {
+	case []float64:
+		return maxAnyType(values)
+	case []float32:
+		return maxAnyType(values)
+	case []int:
+		return maxAnyType(values)
+	case []int64:
+		return maxAnyType(values)
+	case []int32:
+		return maxAnyType(values)
+	default:
+		return 0.0, errors.New("function 'max' only on list of values (float64, float32, int, int32, int64)")
 	}
-	return s, nil
+}
+
+func medianAnyType[T float64 | float32 | int | int32 | int64](values []T) (T, error) {
+	if len(values) == 0 {
+		return 0.0, errors.New("median function requires at least one argument")
+	}
+	slices.Sort(values)
+	var median T
+	if midPoint := len(values) % 2; midPoint == 0 {
+		median = (values[midPoint-1] + values[midPoint]) / 2
+	} else {
+		median = values[midPoint]
+	}
+	return median, nil
 }

 // Get the median value
-func medianfunc(args ...interface{}) (interface{}, error) {
-	switch values := args[0].(type) {
+func medianfunc(args interface{}) (interface{}, error) {
+	switch values := args.(type) {
 	case []float64:
-		sort.Float64s(values)
-		return values[len(values)/2], nil
-	// case []float32:
-	// 	sort.Float64s(values)
-	// 	return values[len(values)/2], nil
+		return medianAnyType(values)
+	case []float32:
+		return medianAnyType(values)
 	case []int:
-		sort.Ints(values)
-		return values[len(values)/2], nil
-
-		// case []int64:
-		// 	sort.Ints(values)
-		// 	return values[len(values)/2], nil
-		// case []int32:
-		// 	sort.Ints(values)
-		// 	return values[len(values)/2], nil
+		return medianAnyType(values)
+	case []int64:
+		return medianAnyType(values)
+	case []int32:
+		return medianAnyType(values)
+	default:
+		return 0.0, errors.New("function 'median' only on list of values (float64, float32, int, int32, int64)")
 	}
-	return 0.0, errors.New("function 'median()' only on lists of type float64 and int")
 }

 /*
 * Get number of values in list. Returns always an int
 */

-func lenfunc(args ...interface{}) (interface{}, error) {
+func lenfunc(args interface{}) (interface{}, error) {
 	var err error = nil
 	var length int = 0
-	switch values := args[0].(type) {
+	switch values := args.(type) {
 	case []float64:
 		length = len(values)
 	case []float32:
@@ -243,8 +248,8 @@ func matchfunc(args ...interface{}) (interface{}, error) {
 */

 // for a given cpuid, it returns the core id
-func getCpuCoreFunc(args ...interface{}) (interface{}, error) {
-	switch cpuid := args[0].(type) {
+func getCpuCoreFunc(args interface{}) (interface{}, error) {
+	switch cpuid := args.(type) {
 	case int:
 		return topo.GetHwthreadCore(cpuid), nil
 	}
@@ -252,8 +257,8 @@ func getCpuCoreFunc(args ...interface{}) (interface{}, error) {
 }

 // for a given cpuid, it returns the socket id
-func getCpuSocketFunc(args ...interface{}) (interface{}, error) {
-	switch cpuid := args[0].(type) {
+func getCpuSocketFunc(args interface{}) (interface{}, error) {
+	switch cpuid := args.(type) {
 	case int:
 		return topo.GetHwthreadSocket(cpuid), nil
 	}
@@ -261,8 +266,8 @@ func getCpuSocketFunc(args ...interface{}) (interface{}, error) {
 }

 // for a given cpuid, it returns the id of the NUMA node
-func getCpuNumaDomainFunc(args ...interface{}) (interface{}, error) {
-	switch cpuid := args[0].(type) {
+func getCpuNumaDomainFunc(args interface{}) (interface{}, error) {
+	switch cpuid := args.(type) {
 	case int:
 		return topo.GetHwthreadNumaDomain(cpuid), nil
 	}
@@ -270,8 +275,8 @@ func getCpuNumaDomainFunc(args ...interface{}) (interface{}, error) {
 }

 // for a given cpuid, it returns the id of the CPU die
-func getCpuDieFunc(args ...interface{}) (interface{}, error) {
-	switch cpuid := args[0].(type) {
+func getCpuDieFunc(args interface{}) (interface{}, error) {
+	switch cpuid := args.(type) {
 	case int:
 		return topo.GetHwthreadDie(cpuid), nil
 	}
@@ -279,13 +284,13 @@ func getCpuDieFunc(args ...interface{}) (interface{}, error) {
 }

 // for a given core id, it returns the list of cpuids
-func getCpuListOfCoreFunc(args ...interface{}) (interface{}, error) {
+func getCpuListOfCoreFunc(args interface{}) (interface{}, error) {
 	cpulist := make([]int, 0)
-	switch in := args[0].(type) {
+	switch in := args.(type) {
 	case int:
 		for _, c := range topo.CpuData() {
 			if c.Core == in {
-				cpulist = append(cpulist, c.Cpuid)
+				cpulist = append(cpulist, c.CpuID)
 			}
 		}
 	}
@@ -293,13 +298,13 @@ func getCpuListOfCoreFunc(args ...interface{}) (interface{}, error) {
 }

 // for a given socket id, it returns the list of cpuids
-func getCpuListOfSocketFunc(args ...interface{}) (interface{}, error) {
+func getCpuListOfSocketFunc(args interface{}) (interface{}, error) {
 	cpulist := make([]int, 0)
-	switch in := args[0].(type) {
+	switch in := args.(type) {
 	case int:
 		for _, c := range topo.CpuData() {
 			if c.Socket == in {
-				cpulist = append(cpulist, c.Cpuid)
+				cpulist = append(cpulist, c.CpuID)
 			}
 		}
 	}
@@ -307,13 +312,13 @@ func getCpuListOfSocketFunc(args ...interface{}) (interface{}, error) {
 }

 // for a given id of a NUMA domain, it returns the list of cpuids
-func getCpuListOfNumaDomainFunc(args ...interface{}) (interface{}, error) {
+func getCpuListOfNumaDomainFunc(args interface{}) (interface{}, error) {
 	cpulist := make([]int, 0)
-	switch in := args[0].(type) {
+	switch in := args.(type) {
 	case int:
 		for _, c := range topo.CpuData() {
-			if c.Numadomain == in {
-				cpulist = append(cpulist, c.Cpuid)
+			if c.NumaDomain == in {
+				cpulist = append(cpulist, c.CpuID)
 			}
 		}
 	}
@@ -321,13 +326,13 @@ func getCpuListOfNumaDomainFunc(args ...interface{}) (interface{}, error) {
 }

 // for a given CPU die id, it returns the list of cpuids
-func getCpuListOfDieFunc(args ...interface{}) (interface{}, error) {
+func getCpuListOfDieFunc(args interface{}) (interface{}, error) {
 	cpulist := make([]int, 0)
-	switch in := args[0].(type) {
+	switch in := args.(type) {
 	case int:
 		for _, c := range topo.CpuData() {
 			if c.Die == in {
-				cpulist = append(cpulist, c.Cpuid)
+				cpulist = append(cpulist, c.CpuID)
 			}
 		}
 	}
@@ -335,7 +340,7 @@ func getCpuListOfDieFunc(args ...interface{}) (interface{}, error) {
 }

 // wrapper function to get a list of all cpuids of the node
-func getCpuListOfNode(args ...interface{}) (interface{}, error) {
+func getCpuListOfNode() (interface{}, error) {
 	return topo.HwthreadList(), nil
 }

--- a/pkg/ccMetric/ccMetric.go
+++ b/pkg/ccMetric/ccMetric.go
@@ -7,6 +7,7 @@ import (
 	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
 	write "github.com/influxdata/influxdb-client-go/v2/api/write"
 	lp "github.com/influxdata/line-protocol" // MIT license
+	"golang.org/x/exp/maps"
 )

 // Most functions are derived from github.com/influxdata/line-protocol/metric.go
@@ -64,9 +65,11 @@ func (m *ccMetric) String() string {
 // ToLineProtocol generates influxDB line protocol for data type ccMetric
 func (m *ccMetric) ToPoint(metaAsTags map[string]bool) (p *write.Point) {
 	p = influxdb2.NewPoint(m.name, m.tags, m.fields, m.tm)
-	for key, ok1 := range metaAsTags {
-		if val, ok2 := m.GetMeta(key); ok1 && ok2 {
-			p.AddTag(key, val)
+	for key, use_as_tag := range metaAsTags {
+		if use_as_tag {
+			if value, ok := m.GetMeta(key); ok {
+				p.AddTag(key, value)
+			}
 		}
 	}
 	return p
@@ -193,19 +196,13 @@ func New(
 ) (CCMetric, error) {
 	m := &ccMetric{
 		name:   name,
-		tags:   make(map[string]string, len(tags)),
-		meta:   make(map[string]string, len(meta)),
+		tags:   maps.Clone(tags),
+		meta:   maps.Clone(meta),
 		fields: make(map[string]interface{}, len(fields)),
 		tm:     tm,
 	}

-	// deep copy tags, meta data tags and fields
-	for k, v := range tags {
-		m.tags[k] = v
-	}
-	for k, v := range meta {
-		m.meta[k] = v
-	}
+	// deep copy fields
 	for k, v := range fields {
 		v := convertField(v)
 		if v == nil {
@@ -219,28 +216,14 @@ func New(

 // FromMetric copies the metric <other>
 func FromMetric(other CCMetric) CCMetric {
-	otags := other.Tags()
-	ometa := other.Meta()
-	ofields := other.Fields()
-	m := &ccMetric{
+
+	return &ccMetric{
 		name:   other.Name(),
-		tags:   make(map[string]string, len(otags)),
-		meta:   make(map[string]string, len(ometa)),
-		fields: make(map[string]interface{}, len(ofields)),
+		tags:   maps.Clone(other.Tags()),
+		meta:   maps.Clone(other.Meta()),
+		fields: maps.Clone(other.Fields()),
 		tm:     other.Time(),
 	}
-
-	// deep copy tags, meta data tags and fields
-	for key, value := range otags {
-		m.tags[key] = value
-	}
-	for key, value := range ometa {
-		m.meta[key] = value
-	}
-	for key, value := range ofields {
-		m.fields[key] = value
-	}
-	return m
 }

 // FromInfluxMetric copies the influxDB line protocol metric <other>
@@ -264,8 +247,10 @@ func FromInfluxMetric(other lp.Metric) CCMetric {
 }

 // convertField converts data types of fields by the following schemata:
-//                         *float32, *float64,                      float32, float64 -> float64
-//  *int,  *int8,  *int16,   *int32,   *int64,  int,  int8,  int16,   int32,   int64 ->   int64
+//
+//	                       *float32, *float64,                      float32, float64 -> float64
+//	*int,  *int8,  *int16,   *int32,   *int64,  int,  int8,  int16,   int32,   int64 ->   int64
+//
 // *uint, *uint8, *uint16,  *uint32,  *uint64, uint, uint8, uint16,  uint32,  uint64 ->  uint64
 // *[]byte, *string,                           []byte, string                        -> string
 // *bool,                                      bool                                  -> bool
--- a/pkg/ccTopology/ccTopology.go
+++ b/pkg/ccTopology/ccTopology.go
@@ -2,7 +2,6 @@ package ccTopology

 import (
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -11,93 +10,247 @@ import (
 	"strings"

 	cclogger "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	"golang.org/x/exp/slices"
 )

-const SYSFS_NUMABASE = `/sys/devices/system/node`
 const SYSFS_CPUBASE = `/sys/devices/system/cpu`
-const PROCFS_CPUINFO = `/proc/cpuinfo`

-// intArrayContains scans an array of ints if the value str is present in the array
-// If the specified value is found, the corresponding array index is returned.
-// The bool value is used to signal success or failure
-func intArrayContains(array []int, str int) (int, bool) {
-	for i, a := range array {
-		if a == str {
-			return i, true
-		}
-	}
-	return -1, false
+// Structure holding all information about a hardware thread
+// See https://www.kernel.org/doc/Documentation/ABI/stable/sysfs-devices-system-cpu
+type HwthreadEntry struct {
+	// for each CPUx:
+	CpuID        int   // CPU / hardware thread ID
+	SMT          int   // Simultaneous Multithreading ID
+	CoreCPUsList []int // CPUs within the same core
+	Core         int   // Socket local core ID
+	Socket       int   // Sockets (physical) ID
+	Die          int   // Die ID
+	NumaDomain   int   // NUMA Domain
 }

-// Used internally for sysfs file reads
+var cache struct {
+	HwthreadList   []int // List of CPU hardware threads
+	SMTList        []int // List of symmetric hyper threading IDs
+	CoreList       []int // List of CPU core IDs
+	SocketList     []int // List of CPU sockets (physical) IDs
+	DieList        []int // List of CPU Die IDs
+	NumaDomainList []int // List of NUMA Domains
+
+	CpuData []HwthreadEntry
+}
+
+// fileToInt reads an integer value from a sysfs file
+// In case of an error -1 is returned
 func fileToInt(path string) int {
-	buffer, err := ioutil.ReadFile(path)
+	buffer, err := os.ReadFile(path)
 	if err != nil {
 		log.Print(err)
-		cclogger.ComponentError("ccTopology", "Reading", path, ":", err.Error())
+		cclogger.ComponentError("ccTopology", "fileToInt", "Reading", path, ":", err.Error())
 		return -1
 	}
-	sbuffer := strings.Replace(string(buffer), "\n", "", -1)
-	var id int64
-	//_, err = fmt.Scanf("%d", sbuffer, &id)
-	id, err = strconv.ParseInt(sbuffer, 10, 32)
+	stringBuffer := strings.TrimSpace(string(buffer))
+	id, err := strconv.Atoi(stringBuffer)
 	if err != nil {
-		cclogger.ComponentError("ccTopology", "Parsing", path, ":", sbuffer, err.Error())
+		cclogger.ComponentError("ccTopology", "fileToInt", "Parsing", path, ":", stringBuffer, err.Error())
 		return -1
 	}
-	return int(id)
+	return id
 }

-// Get list of CPU socket IDs
+// fileToList reads a list from a sysfs file
+// A list consists of value ranges separated by colon
+// A range can be a single value or a range of values given by a startValue-endValue
+// In case of an error nil is returned
+func fileToList(path string) []int {
+	// Read list
+	buffer, err := os.ReadFile(path)
+	if err != nil {
+		log.Print(err)
+		cclogger.ComponentError("ccTopology", "fileToList", "Reading", path, ":", err.Error())
+		return nil
+	}
+
+	// Create list
+	list := make([]int, 0)
+	stringBuffer := strings.TrimSpace(string(buffer))
+	for _, valueRangeString := range strings.Split(stringBuffer, ",") {
+		valueRange := strings.Split(valueRangeString, "-")
+		switch len(valueRange) {
+		case 1:
+			singleValue, err := strconv.Atoi(valueRange[0])
+			if err != nil {
+				cclogger.ComponentError("CCTopology", "fileToList", "Parsing", valueRange[0], ":", err.Error())
+				return nil
+			}
+			list = append(list, singleValue)
+		case 2:
+			startValue, err := strconv.Atoi(valueRange[0])
+			if err != nil {
+				cclogger.ComponentError("CCTopology", "fileToList", "Parsing", valueRange[0], ":", err.Error())
+				return nil
+			}
+			endValue, err := strconv.Atoi(valueRange[1])
+			if err != nil {
+				cclogger.ComponentError("CCTopology", "fileToList", "Parsing", valueRange[1], ":", err.Error())
+				return nil
+			}
+			for value := startValue; value <= endValue; value++ {
+				list = append(list, value)
+			}
+		}
+	}
+
+	return list
+}
+
+// init initializes the cache structure
+func init() {
+
+	getHWThreads :=
+		func() []int {
+			globPath := filepath.Join(SYSFS_CPUBASE, "cpu[0-9]*")
+			regexPath := filepath.Join(SYSFS_CPUBASE, "cpu([[:digit:]]+)")
+			regex := regexp.MustCompile(regexPath)
+
+			// File globbing for hardware threads
+			files, err := filepath.Glob(globPath)
+			if err != nil {
+				cclogger.ComponentError("CCTopology", "init:getHWThreads", err.Error())
+				return nil
+			}
+
+			hwThreadIDs := make([]int, len(files))
+			for i, file := range files {
+				// Extract hardware thread ID
+				matches := regex.FindStringSubmatch(file)
+				if len(matches) != 2 {
+					cclogger.ComponentError("CCTopology", "init:getHWThreads: Failed to extract hardware thread ID from ", file)
+					return nil
+				}
+
+				// Convert hardware thread ID to int
+				id, err := strconv.Atoi(matches[1])
+				if err != nil {
+					cclogger.ComponentError("CCTopology", "init:getHWThreads: Failed to convert to int hardware thread ID ", matches[1])
+					return nil
+				}
+
+				hwThreadIDs[i] = id
+			}
+
+			// Sort hardware thread IDs
+			slices.Sort(hwThreadIDs)
+			return hwThreadIDs
+		}
+
+	getNumaDomain :=
+		func(basePath string) int {
+			globPath := filepath.Join(basePath, "node*")
+			regexPath := filepath.Join(basePath, "node([[:digit:]]+)")
+			regex := regexp.MustCompile(regexPath)
+
+			// File globbing for NUMA node
+			files, err := filepath.Glob(globPath)
+			if err != nil {
+				cclogger.ComponentError("CCTopology", "init:getNumaDomain", err.Error())
+				return -1
+			}
+
+			// Check, that exactly one NUMA domain was found
+			if len(files) != 1 {
+				cclogger.ComponentError("CCTopology", "init:getNumaDomain", "Number of NUMA domains != 1: ", len(files))
+				return -1
+			}
+
+			// Extract NUMA node ID
+			matches := regex.FindStringSubmatch(files[0])
+			if len(matches) != 2 {
+				cclogger.ComponentError("CCTopology", "init:getNumaDomain", "Failed to extract NUMA node ID from: ", files[0])
+				return -1
+			}
+
+			id, err := strconv.Atoi(matches[1])
+			if err != nil {
+				cclogger.ComponentError("CCTopology", "init:getNumaDomain", "Failed to parse NUMA node ID from: ", matches[1])
+				return -1
+			}
+
+			return id
+		}
+
+	cache.HwthreadList = getHWThreads()
+	cache.CoreList = make([]int, len(cache.HwthreadList))
+	cache.SocketList = make([]int, len(cache.HwthreadList))
+	cache.DieList = make([]int, len(cache.HwthreadList))
+	cache.SMTList = make([]int, len(cache.HwthreadList))
+	cache.NumaDomainList = make([]int, len(cache.HwthreadList))
+	cache.CpuData = make([]HwthreadEntry, len(cache.HwthreadList))
+	for i, c := range cache.HwthreadList {
+		// Set cpuBase directory for topology lookup
+		cpuBase := filepath.Join(SYSFS_CPUBASE, fmt.Sprintf("cpu%d", c))
+		topoBase := filepath.Join(cpuBase, "topology")
+
+		// Lookup Core ID
+		cache.CoreList[i] = fileToInt(filepath.Join(topoBase, "core_id"))
+
+		// Lookup socket / physical package ID
+		cache.SocketList[i] = fileToInt(filepath.Join(topoBase, "physical_package_id"))
+
+		// Lookup CPU die id
+		cache.DieList[i] = fileToInt(filepath.Join(topoBase, "die_id"))
+		if cache.DieList[i] < 0 {
+			cache.DieList[i] = cache.SocketList[i]
+		}
+
+		// Lookup List of CPUs within the same core
+		coreCPUsList := fileToList(filepath.Join(topoBase, "core_cpus_list"))
+
+		// Find index of CPU ID in List of CPUs within the same core
+		// if not found return -1
+		cache.SMTList[i] = slices.Index(coreCPUsList, c)
+
+		// Lookup NUMA domain id
+		cache.NumaDomainList[i] = getNumaDomain(cpuBase)
+
+		cache.CpuData[i] =
+			HwthreadEntry{
+				CpuID:        cache.HwthreadList[i],
+				SMT:          cache.SMTList[i],
+				CoreCPUsList: coreCPUsList,
+				Socket:       cache.SocketList[i],
+				NumaDomain:   cache.NumaDomainList[i],
+				Die:          cache.DieList[i],
+				Core:         cache.CoreList[i],
+			}
+	}
+
+	slices.Sort(cache.HwthreadList)
+	cache.HwthreadList = slices.Compact(cache.HwthreadList)
+
+	slices.Sort(cache.SMTList)
+	cache.SMTList = slices.Compact(cache.SMTList)
+
+	slices.Sort(cache.CoreList)
+	cache.CoreList = slices.Compact(cache.CoreList)
+
+	slices.Sort(cache.SocketList)
+	cache.SocketList = slices.Compact(cache.SocketList)
+
+	slices.Sort(cache.DieList)
+	cache.DieList = slices.Compact(cache.DieList)
+
+	slices.Sort(cache.NumaDomainList)
+	cache.NumaDomainList = slices.Compact(cache.NumaDomainList)
+}
+
+// SocketList gets the list of CPU socket IDs
 func SocketList() []int {
-	buffer, err := ioutil.ReadFile(string(PROCFS_CPUINFO))
-	if err != nil {
-		log.Print(err)
-		return nil
-	}
-	ll := strings.Split(string(buffer), "\n")
-	packs := make([]int, 0)
-	for _, line := range ll {
-		if strings.HasPrefix(line, "physical id") {
-			lv := strings.Fields(line)
-			id, err := strconv.ParseInt(lv[3], 10, 32)
-			if err != nil {
-				log.Print(err)
-				return packs
-			}
-			_, found := intArrayContains(packs, int(id))
-			if !found {
-				packs = append(packs, int(id))
-			}
-		}
-	}
-	return packs
+	return slices.Clone(cache.SocketList)
 }

-// Get list of hardware thread IDs in the order of listing in /proc/cpuinfo
+// HwthreadList gets the list of hardware thread IDs in the order of listing in /proc/cpuinfo
 func HwthreadList() []int {
-	buffer, err := ioutil.ReadFile(string(PROCFS_CPUINFO))
-	if err != nil {
-		log.Print(err)
-		return nil
-	}
-	ll := strings.Split(string(buffer), "\n")
-	cpulist := make([]int, 0)
-	for _, line := range ll {
-		if strings.HasPrefix(line, "processor") {
-			lv := strings.Fields(line)
-			id, err := strconv.ParseInt(lv[2], 10, 32)
-			if err != nil {
-				log.Print(err)
-				return cpulist
-			}
-			_, found := intArrayContains(cpulist, int(id))
-			if !found {
-				cpulist = append(cpulist, int(id))
-			}
-		}
-	}
-	return cpulist
+	return slices.Clone(cache.HwthreadList)
 }

 // Get list of hardware thread IDs in the order of listing in /proc/cpuinfo
@@ -106,88 +259,25 @@ func CpuList() []int {
 	return HwthreadList()
 }

-// Get list of CPU core IDs in the order of listing in /proc/cpuinfo
+// CoreList gets the list of CPU core IDs in the order of listing in /proc/cpuinfo
 func CoreList() []int {
-	buffer, err := ioutil.ReadFile(string(PROCFS_CPUINFO))
-	if err != nil {
-		log.Print(err)
-		return nil
-	}
-	ll := strings.Split(string(buffer), "\n")
-	corelist := make([]int, 0)
-	for _, line := range ll {
-		if strings.HasPrefix(line, "core id") {
-			lv := strings.Fields(line)
-			id, err := strconv.ParseInt(lv[3], 10, 32)
-			if err != nil {
-				log.Print(err)
-				return corelist
-			}
-			_, found := intArrayContains(corelist, int(id))
-			if !found {
-				corelist = append(corelist, int(id))
-			}
-		}
-	}
-	return corelist
+	return slices.Clone(cache.CoreList)
 }

 // Get list of NUMA node IDs
 func NumaNodeList() []int {
-	numaList := make([]int, 0)
-	globPath := filepath.Join(string(SYSFS_NUMABASE), "node*")
-	regexPath := filepath.Join(string(SYSFS_NUMABASE), "node(\\d+)")
-	regex := regexp.MustCompile(regexPath)
-	files, err := filepath.Glob(globPath)
-	if err != nil {
-		cclogger.ComponentError("CCTopology", "NumaNodeList", err.Error())
-	}
-	for _, f := range files {
-		if !regex.MatchString(f) {
-			continue
-		}
-		finfo, err := os.Lstat(f)
-		if err != nil {
-			continue
-		}
-		if !finfo.IsDir() {
-			continue
-		}
-		matches := regex.FindStringSubmatch(f)
-		if len(matches) == 2 {
-			id, err := strconv.Atoi(matches[1])
-			if err == nil {
-				if _, found := intArrayContains(numaList, id); !found {
-					numaList = append(numaList, id)
-				}
-			}
-		}
-
-	}
-	return numaList
+	return slices.Clone(cache.NumaDomainList)
 }

-// Get list of CPU die IDs
+// DieList gets the list of CPU die IDs
 func DieList() []int {
-	cpulist := HwthreadList()
-	dielist := make([]int, 0)
-	for _, c := range cpulist {
-		diepath := filepath.Join(string(SYSFS_CPUBASE), fmt.Sprintf("cpu%d", c), "topology/die_id")
-		dieid := fileToInt(diepath)
-		if dieid > 0 {
-			_, found := intArrayContains(dielist, int(dieid))
-			if !found {
-				dielist = append(dielist, int(dieid))
-			}
-		}
-	}
-	if len(dielist) > 0 {
-		return dielist
+	if len(cache.DieList) > 0 {
+		return slices.Clone(cache.DieList)
 	}
 	return SocketList()
 }

-// Get list of specified type using the naming format inside ClusterCockpit
+// GetTypeList gets the list of specified type using the naming format inside ClusterCockpit
 func GetTypeList(topology_type string) []int {
 	switch topology_type {
 	case "node":
@@ -206,128 +296,14 @@ func GetTypeList(topology_type string) []int {
 	return []int{}
 }

-// Structure holding all information about a hardware thread
-type HwthreadEntry struct {
-	Cpuid      int
-	SMT        int
-	Core       int
-	Socket     int
-	Numadomain int
-	Die        int
-}
-
+// CpuData returns CPU data for each hardware thread
 func CpuData() []HwthreadEntry {
-
-	// fileToInt := func(path string) int {
-	// 	buffer, err := ioutil.ReadFile(path)
-	// 	if err != nil {
-	// 		log.Print(err)
-	// 		//cclogger.ComponentError("ccTopology", "Reading", path, ":", err.Error())
-	// 		return -1
-	// 	}
-	// 	sbuffer := strings.Replace(string(buffer), "\n", "", -1)
-	// 	var id int64
-	// 	//_, err = fmt.Scanf("%d", sbuffer, &id)
-	// 	id, err = strconv.ParseInt(sbuffer, 10, 32)
-	// 	if err != nil {
-	// 		cclogger.ComponentError("ccTopology", "Parsing", path, ":", sbuffer, err.Error())
-	// 		return -1
-	// 	}
-	// 	return int(id)
-	// }
-	getCore := func(basepath string) int {
-		return fileToInt(fmt.Sprintf("%s/core_id", basepath))
+	// return a deep copy to protect cache data
+	c := slices.Clone(cache.CpuData)
+	for i := range c {
+		c[i].CoreCPUsList = slices.Clone(cache.CpuData[i].CoreCPUsList)
 	}
-
-	getSocket := func(basepath string) int {
-		return fileToInt(fmt.Sprintf("%s/physical_package_id", basepath))
-	}
-
-	getDie := func(basepath string) int {
-		return fileToInt(fmt.Sprintf("%s/die_id", basepath))
-	}
-
-	getSMT := func(cpuid int, basepath string) int {
-		buffer, err := ioutil.ReadFile(fmt.Sprintf("%s/thread_siblings_list", basepath))
-		if err != nil {
-			cclogger.ComponentError("CCTopology", "CpuData:getSMT", err.Error())
-		}
-		threadlist := make([]int, 0)
-		sbuffer := strings.Replace(string(buffer), "\n", "", -1)
-		for _, x := range strings.Split(sbuffer, ",") {
-			id, err := strconv.ParseInt(x, 10, 32)
-			if err != nil {
-				cclogger.ComponentError("CCTopology", "CpuData:getSMT", err.Error())
-			}
-			threadlist = append(threadlist, int(id))
-		}
-		for i, x := range threadlist {
-			if x == cpuid {
-				return i
-			}
-		}
-		return 1
-	}
-
-	getNumaDomain := func(basepath string) int {
-		globPath := filepath.Join(basepath, "node*")
-		regexPath := filepath.Join(basepath, "node(\\d+)")
-		regex := regexp.MustCompile(regexPath)
-		files, err := filepath.Glob(globPath)
-		if err != nil {
-			cclogger.ComponentError("CCTopology", "CpuData:getNumaDomain", err.Error())
-		}
-		for _, f := range files {
-			finfo, err := os.Lstat(f)
-			if err == nil && finfo.IsDir() {
-				matches := regex.FindStringSubmatch(f)
-				if len(matches) == 2 {
-					id, err := strconv.Atoi(matches[1])
-					if err == nil {
-						return id
-					}
-				}
-			}
-		}
-		return 0
-	}
-
-	clist := make([]HwthreadEntry, 0)
-	for _, c := range HwthreadList() {
-		clist = append(clist, HwthreadEntry{Cpuid: c})
-	}
-	for i, centry := range clist {
-		centry.Socket = -1
-		centry.Numadomain = -1
-		centry.Die = -1
-		centry.Core = -1
-		// Set base directory for topology lookup
-		cpustr := fmt.Sprintf("cpu%d", centry.Cpuid)
-		base := filepath.Join("/sys/devices/system/cpu", cpustr)
-		topoBase := filepath.Join(base, "topology")
-
-		// Lookup CPU core id
-		centry.Core = getCore(topoBase)
-
-		// Lookup CPU socket id
-		centry.Socket = getSocket(topoBase)
-
-		// Lookup CPU die id
-		centry.Die = getDie(topoBase)
-		if centry.Die < 0 {
-			centry.Die = centry.Socket
-		}
-
-		// Lookup SMT thread id
-		centry.SMT = getSMT(centry.Cpuid, topoBase)
-
-		// Lookup NUMA domain id
-		centry.Numadomain = getNumaDomain(base)
-
-		// Update values in output list
-		clist[i] = centry
-	}
-	return clist
+	return c
 }

 // Structure holding basic information about a CPU
@@ -340,130 +316,110 @@ type CpuInformation struct {
 	NumNumaDomains int
 }

-// Get basic information about the CPU
+// CpuInformation reports basic information about the CPU
 func CpuInfo() CpuInformation {
-	var c CpuInformation
-
-	smtList := make([]int, 0)
-	numaList := make([]int, 0)
-	dieList := make([]int, 0)
-	socketList := make([]int, 0)
-	coreList := make([]int, 0)
-	cdata := CpuData()
-	for _, d := range cdata {
-		if _, ok := intArrayContains(smtList, d.SMT); !ok {
-			smtList = append(smtList, d.SMT)
-		}
-		if _, ok := intArrayContains(numaList, d.Numadomain); !ok {
-			numaList = append(numaList, d.Numadomain)
-		}
-		if _, ok := intArrayContains(dieList, d.Die); !ok {
-			dieList = append(dieList, d.Die)
-		}
-		if _, ok := intArrayContains(socketList, d.Socket); !ok {
-			socketList = append(socketList, d.Socket)
-		}
-		if _, ok := intArrayContains(coreList, d.Core); !ok {
-			coreList = append(coreList, d.Core)
-		}
+	return CpuInformation{
+		NumNumaDomains: len(cache.NumaDomainList),
+		SMTWidth:       len(cache.SMTList),
+		NumDies:        len(cache.DieList),
+		NumCores:       len(cache.CoreList),
+		NumSockets:     len(cache.SocketList),
+		NumHWthreads:   len(cache.HwthreadList),
 	}
-	c.NumNumaDomains = len(numaList)
-	c.SMTWidth = len(smtList)
-	c.NumDies = len(dieList)
-	c.NumCores = len(coreList)
-	c.NumSockets = len(socketList)
-	c.NumHWthreads = len(cdata)
-	return c
 }

-// Get the CPU socket ID for a given hardware thread ID
-func GetHwthreadSocket(cpuid int) int {
-	cdata := CpuData()
-	for _, d := range cdata {
-		if d.Cpuid == cpuid {
+// GetHwthreadSocket gets the CPU socket ID for a given hardware thread ID
+// In case hardware thread ID is not found -1 is returned
+func GetHwthreadSocket(cpuID int) int {
+	for i := range cache.CpuData {
+		d := &cache.CpuData[i]
+		if d.CpuID == cpuID {
 			return d.Socket
 		}
 	}
 	return -1
 }

-// Get the NUMA node ID for a given hardware thread ID
-func GetHwthreadNumaDomain(cpuid int) int {
-	cdata := CpuData()
-	for _, d := range cdata {
-		if d.Cpuid == cpuid {
-			return d.Numadomain
+// GetHwthreadNumaDomain gets the NUMA domain ID for a given hardware thread ID
+// In case hardware thread ID is not found -1 is returned
+func GetHwthreadNumaDomain(cpuID int) int {
+	for i := range cache.CpuData {
+		d := &cache.CpuData[i]
+		if d.CpuID == cpuID {
+			return d.NumaDomain
 		}
 	}
 	return -1
 }

-// Get the CPU die ID for a given hardware thread ID
-func GetHwthreadDie(cpuid int) int {
-	cdata := CpuData()
-	for _, d := range cdata {
-		if d.Cpuid == cpuid {
+// GetHwthreadDie gets the CPU die ID for a given hardware thread ID
+// In case hardware thread ID is not found -1 is returned
+func GetHwthreadDie(cpuID int) int {
+	for i := range cache.CpuData {
+		d := &cache.CpuData[i]
+		if d.CpuID == cpuID {
 			return d.Die
 		}
 	}
 	return -1
 }

-// Get the CPU core ID for a given hardware thread ID
-func GetHwthreadCore(cpuid int) int {
-	cdata := CpuData()
-	for _, d := range cdata {
-		if d.Cpuid == cpuid {
+// GetHwthreadCore gets the CPU core ID for a given hardware thread ID
+// In case hardware thread ID is not found -1 is returned
+func GetHwthreadCore(cpuID int) int {
+	for i := range cache.CpuData {
+		d := &cache.CpuData[i]
+		if d.CpuID == cpuID {
 			return d.Core
 		}
 	}
 	return -1
 }

-// Get the all hardware thread ID associated with a CPU socket
+// GetSocketHwthreads gets all hardware thread IDs associated with a CPU socket
 func GetSocketHwthreads(socket int) []int {
-	all := CpuData()
-	cpulist := make([]int, 0)
-	for _, d := range all {
+	cpuList := make([]int, 0)
+	for i := range cache.CpuData {
+		d := &cache.CpuData[i]
 		if d.Socket == socket {
-			cpulist = append(cpulist, d.Cpuid)
+			cpuList = append(cpuList, d.CpuID)
 		}
 	}
-	return cpulist
+	return cpuList
 }

-// Get the all hardware thread ID associated with a NUMA node
-func GetNumaDomainHwthreads(domain int) []int {
-	all := CpuData()
-	cpulist := make([]int, 0)
-	for _, d := range all {
-		if d.Numadomain == domain {
-			cpulist = append(cpulist, d.Cpuid)
+// GetNumaDomainHwthreads gets the all hardware thread IDs associated with a NUMA domain
+func GetNumaDomainHwthreads(numaDomain int) []int {
+	cpuList := make([]int, 0)
+	for i := range cache.CpuData {
+		d := &cache.CpuData[i]
+		if d.NumaDomain == numaDomain {
+			cpuList = append(cpuList, d.CpuID)
 		}
 	}
-	return cpulist
+	return cpuList
 }

-// Get the all hardware thread ID associated with a CPU die
+// GetDieHwthreads gets all hardware thread IDs associated with a CPU die
 func GetDieHwthreads(die int) []int {
-	all := CpuData()
-	cpulist := make([]int, 0)
-	for _, d := range all {
+	cpuList := make([]int, 0)
+	for i := range cache.CpuData {
+		d := &cache.CpuData[i]
 		if d.Die == die {
-			cpulist = append(cpulist, d.Cpuid)
+			cpuList = append(cpuList, d.CpuID)
 		}
 	}
-	return cpulist
+	return cpuList
 }

-// Get the all hardware thread ID associated with a CPU core
+// GetCoreHwthreads get all hardware thread IDs associated with a CPU core
 func GetCoreHwthreads(core int) []int {
-	all := CpuData()
-	cpulist := make([]int, 0)
-	for _, d := range all {
+	cpuList := make([]int, 0)
+	for i := range cache.CpuData {
+		d := &cache.CpuData[i]
 		if d.Core == core {
-			cpulist = append(cpulist, d.Cpuid)
+			cpuList = append(cpuList, d.CpuID)
 		}
 	}
-	return cpulist
+	return cpuList
 }
--- a/pkg/hostlist/hostlist.go
+++ b/pkg/hostlist/hostlist.go
@@ -0,0 +1,125 @@
+package hostlist
+
+import (
+	"fmt"
+	"regexp"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+func Expand(in string) (result []string, err error) {
+
+	// Create ranges regular expression
+	reStNumber := "[[:digit:]]+"
+	reStRange := reStNumber + "-" + reStNumber
+	reStOptionalNumberOrRange := "(" + reStNumber + ",|" + reStRange + ",)*"
+	reStNumberOrRange := "(" + reStNumber + "|" + reStRange + ")"
+	reStBraceLeft := "[[]"
+	reStBraceRight := "[]]"
+	reStRanges := reStBraceLeft +
+		reStOptionalNumberOrRange +
+		reStNumberOrRange +
+		reStBraceRight
+	reRanges := regexp.MustCompile(reStRanges)
+
+	// Create host list regular expression
+	reStDNSChars := "[a-zA-Z0-9-]+"
+	reStPrefix := "^(" + reStDNSChars + ")"
+	reStOptionalSuffix := "(" + reStDNSChars + ")?"
+	re := regexp.MustCompile(reStPrefix + "([[][0-9,-]+[]])?" + reStOptionalSuffix)
+
+	// Remove all delimiters from the input
+	in = strings.TrimLeft(in, ", ")
+
+	for len(in) > 0 {
+		if v := re.FindStringSubmatch(in); v != nil {
+
+			// Remove matched part from the input
+			lenPrefix := len(v[0])
+			in = in[lenPrefix:]
+
+			// Remove all delimiters from the input
+			in = strings.TrimLeft(in, ", ")
+
+			// matched prefix, range and suffix
+			hlPrefix := v[1]
+			hlRanges := v[2]
+			hlSuffix := v[3]
+
+			// Single node without ranges
+			if hlRanges == "" {
+				result = append(result, hlPrefix)
+				continue
+			}
+
+			// Node with ranges
+			if v := reRanges.FindStringSubmatch(hlRanges); v != nil {
+
+				// Remove braces
+				hlRanges = hlRanges[1 : len(hlRanges)-1]
+
+				// Split host ranges at ,
+				for _, hlRange := range strings.Split(hlRanges, ",") {
+
+					// Split host range at -
+					RangeStartEnd := strings.Split(hlRange, "-")
+
+					// Range is only a single number
+					if len(RangeStartEnd) == 1 {
+						result = append(result, hlPrefix+RangeStartEnd[0]+hlSuffix)
+						continue
+					}
+
+					// Range has a start and an end
+					widthRangeStart := len(RangeStartEnd[0])
+					widthRangeEnd := len(RangeStartEnd[1])
+					iStart, _ := strconv.ParseUint(RangeStartEnd[0], 10, 64)
+					iEnd, _ := strconv.ParseUint(RangeStartEnd[1], 10, 64)
+					if iStart > iEnd {
+						return nil, fmt.Errorf("single range start is greater than end: %s", hlRange)
+					}
+
+					// Create print format string for range numbers
+					doPadding := widthRangeStart == widthRangeEnd
+					widthPadding := widthRangeStart
+					var formatString string
+					if doPadding {
+						formatString = "%0" + fmt.Sprint(widthPadding) + "d"
+					} else {
+						formatString = "%d"
+					}
+					formatString = hlPrefix + formatString + hlSuffix
+
+					// Add nodes from this range
+					for i := iStart; i <= iEnd; i++ {
+						result = append(result, fmt.Sprintf(formatString, i))
+					}
+				}
+			} else {
+				return nil, fmt.Errorf("not at hostlist range: %s", hlRanges)
+			}
+		} else {
+			return nil, fmt.Errorf("not a hostlist: %s", in)
+		}
+	}
+
+	if result != nil {
+		// sort
+		sort.Strings(result)
+
+		// uniq
+		previous := 1
+		for current := 1; current < len(result); current++ {
+			if result[current-1] != result[current] {
+				if previous != current {
+					result[previous] = result[current]
+				}
+				previous++
+			}
+		}
+		result = result[:previous]
+	}
+
+	return
+}
--- a/pkg/hostlist/hostlist_test.go
+++ b/pkg/hostlist/hostlist_test.go
@@ -0,0 +1,126 @@
+package hostlist
+
+import (
+	"testing"
+)
+
+func TestExpand(t *testing.T) {
+
+	// Compare two slices of strings
+	equal := func(a, b []string) bool {
+		if len(a) != len(b) {
+			return false
+		}
+		for i, v := range a {
+			if v != b[i] {
+				return false
+			}
+		}
+		return true
+	}
+
+	type testDefinition struct {
+		input          string
+		resultExpected []string
+		errorExpected  bool
+	}
+
+	expandTests := []testDefinition{
+		{
+			// Single node
+			input:          "n1",
+			resultExpected: []string{"n1"},
+			errorExpected:  false,
+		},
+		{
+			// Single node, duplicated
+			input:          "n1,n1",
+			resultExpected: []string{"n1"},
+			errorExpected:  false,
+		},
+		{
+			// Single node with padding
+			input:          "n[01]",
+			resultExpected: []string{"n01"},
+			errorExpected:  false,
+		},
+		{
+			// Single node with suffix
+			input:          "n[01]-p",
+			resultExpected: []string{"n01-p"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with a single range
+			input:          "n[1-2]",
+			resultExpected: []string{"n1", "n2"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with a single range and a single index
+			input:          "n[1-2,3]",
+			resultExpected: []string{"n1", "n2", "n3"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with different prefixes
+			input:          "n[1-2],m[1,2]",
+			resultExpected: []string{"m1", "m2", "n1", "n2"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with different suffixes
+			input:          "n[1-2]-p,n[1,2]-q",
+			resultExpected: []string{"n1-p", "n1-q", "n2-p", "n2-q"},
+			errorExpected:  false,
+		},
+		{
+			// Multiple nodes with and without node ranges
+			input:          " n09, n[01-04,06-07,09] , , n10,n04",
+			resultExpected: []string{"n01", "n02", "n03", "n04", "n06", "n07", "n09", "n10"},
+			errorExpected:  false,
+		},
+		{
+			// Forbidden DNS character
+			input:          "n@",
+			resultExpected: []string{},
+			errorExpected:  true,
+		},
+		{
+			// Forbidden range
+			input:          "n[1-2-2,3]",
+			resultExpected: []string{},
+			errorExpected:  true,
+		},
+		{
+			// Forbidden range limits
+			input:          "n[2-1]",
+			resultExpected: []string{},
+			errorExpected:  true,
+		},
+	}
+
+	for _, expandTest := range expandTests {
+		result, err := Expand(expandTest.input)
+
+		hasError := err != nil
+		if hasError != expandTest.errorExpected && hasError {
+			t.Errorf("Expand('%s') failed: unexpected error '%v'",
+				expandTest.input, err)
+			continue
+		}
+		if hasError != expandTest.errorExpected && !hasError {
+			t.Errorf("Expand('%s') did not fail as expected: got result '%+v'",
+				expandTest.input, result)
+			continue
+		}
+		if !hasError && !equal(result, expandTest.resultExpected) {
+			t.Errorf("Expand('%s') failed: got result '%+v', expected result '%v'",
+				expandTest.input, result, expandTest.resultExpected)
+			continue
+		}
+
+		t.Logf("Checked hostlist.Expand('%s'): result = '%+v', err = '%v'",
+			expandTest.input, result, err)
+	}
+}
--- a/receivers.json
+++ b/receivers.json
@@ -7,23 +7,23 @@
    },
    "redfish_recv": {
        "type": "redfish",
+        "endpoint": "https://%h-bmc",
        "client_config": [
            {
-                "hostname": "my-host-1",
+                "host_list": "my-host-1-[1-2]",
                "username": "username-1",
-                "password": "password-1",
-                "endpoint": "https://my-endpoint-1"
+                "password": "password-1"
            },
            {
-                "hostname": "my-host-2",
+                "host_list": "my-host-2-[1,2]",
                "username": "username-2",
-                "password": "password-2",
-                "endpoint": "https://my-endpoint-2"
+                "password": "password-2"
            }
        ]
    },
    "ipmi_recv": {
        "type": "ipmi",
+        "endpoint": "ipmi-sensors://%h-ipmi",
        "exclude_metrics": [
            "fan_speed",
            "voltage"
@@ -32,18 +32,12 @@
            {
                "username": "username-1",
                "password": "password-1",
-                "endpoint": "ipmi-sensors://my-endpoint-1",
-                "host_list": [
-                    "my-host-1"
-                ]
+                "host_list": "my-host-1-[1-2]"
            },
            {
                "username": "username-2",
                "password": "password-2",
-                "endpoint": "ipmi-sensors://my-endpoint-2",
-                "host_list": [
-                    "my-host-2"
-                ]
+                "host_list": "my-host-2-[1,2]"
            }
        ]
    }
--- a/receivers/README.md
+++ b/receivers/README.md
@@ -2,7 +2,7 @@

 This folder contains the ReceiveManager and receiver implementations for the cc-metric-collector.

-# Configuration
+## Configuration

 The configuration file for the receivers is a list of configurations. The `type` field in each specifies which receiver to initialize.

@@ -22,8 +22,11 @@ This allows to specify
 - [`nats`](./natsReceiver.md): Receive metrics from the NATS network
 - [`prometheus`](./prometheusReceiver.md): Scrape data from a Prometheus client
 - [`http`](./httpReceiver.md): Listen for HTTP Post requests transporting metrics in InfluxDB line protocol
+- [`ipmi`](./ipmiReceiver.md): Read IPMI sensor readings
+- [`redfish`](redfishReceiver.md) Use the Redfish (specification) to query thermal and power metrics
+
+## Contributing own receivers

-# Contributing own receivers
 A receiver contains a few functions and is derived from the type `Receiver` (in `metricReceiver.go`):

 For an example, check the [sample receiver](./sampleReceiver.go)
--- a/receivers/appMetricReceiver.go
+++ b/receivers/appMetricReceiver.go
@@ -1,164 +0,0 @@
-package receivers
-
-import (
-	"bufio"
-	"encoding/json"
-	"fmt"
-	"net"
-	"os"
-	"sync"
-
-	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
-	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
-	influx "github.com/influxdata/line-protocol"
-)
-
-// SampleReceiver configuration: receiver type, listen address, port
-type AppMetricReceiverConfig struct {
-	Type       string `json:"type"`
-	SocketFile string `json:"socket_file"`
-}
-
-type AppMetricReceiver struct {
-	receiver
-	config AppMetricReceiverConfig
-
-	// Storage for static information
-	meta map[string]string
-	// Use in case of own go routine
-	done chan bool
-	wg   sync.WaitGroup
-	// Influx stuff
-	handler *influx.MetricHandler
-	parser  *influx.Parser
-	// WaitGroup for individual connections
-	connWg   sync.WaitGroup
-	listener net.Listener
-}
-
-func (r *AppMetricReceiver) newConnection(conn net.Conn) {
-	//defer conn.Close()
-	//defer wg.Done()
-
-	buffer, err := bufio.NewReader(conn).ReadBytes('\n')
-	if err != nil {
-		conn.Close()
-		return
-	}
-
-	metrics, err := r.parser.Parse(buffer)
-	if err != nil {
-		cclog.ComponentError(r.name, "failed to parse received metrics")
-		return
-	}
-	for _, m := range metrics {
-		y := lp.FromInfluxMetric(m)
-		for k, v := range r.meta {
-			y.AddMeta(k, v)
-		}
-		if r.sink != nil {
-			r.sink <- y
-		}
-	}
-
-	r.newConnection(conn)
-
-}
-
-func (r *AppMetricReceiver) newAccepter(listenSocket net.Listener) {
-accept_loop:
-	for {
-		select {
-		case <-r.done:
-			break accept_loop
-		default:
-			conn, err := listenSocket.Accept()
-			if err == nil {
-				r.connWg.Add(1)
-				go func() {
-					r.newConnection(conn)
-					r.connWg.Done()
-				}()
-			}
-		}
-	}
-	r.wg.Done()
-}
-
-// Implement functions required for Receiver interface
-// Start(), Close()
-// See: metricReceiver.go
-
-func (r *AppMetricReceiver) Start() {
-	var err error = nil
-	cclog.ComponentDebug(r.name, "START")
-
-	r.listener, err = net.Listen("unix", r.config.SocketFile)
-	if err != nil {
-		cclog.ComponentError(r.name, "failed to listen at socket", r.config.SocketFile)
-	}
-	if _, err := os.Stat(r.config.SocketFile); err != nil {
-		cclog.ComponentError(r.name, "failed to create socket", r.config.SocketFile)
-	}
-
-	r.done = make(chan bool)
-	r.wg.Add(1)
-	go r.newAccepter(r.listener)
-
-}
-
-// Close receiver: close network connection, close files, close libraries, ...
-func (r *AppMetricReceiver) Close() {
-	cclog.ComponentDebug(r.name, "CLOSE")
-
-	if _, err := os.Stat(r.config.SocketFile); err == nil {
-		if err := os.RemoveAll(r.config.SocketFile); err != nil {
-			cclog.ComponentError(r.name, "Failed to remove UNIX socket", r.config.SocketFile)
-		}
-	}
-
-	// in case of own go routine, send the signal and wait
-	r.listener.Close()
-	r.done <- true
-	close(r.done)
-	r.connWg.Wait()
-	r.wg.Wait()
-}
-
-// New function to create a new instance of the receiver
-// Initialize the receiver by giving it a name and reading in the config JSON
-func NewAppMetricReceiver(name string, config json.RawMessage) (Receiver, error) {
-	r := new(AppMetricReceiver)
-
-	// Set name of SampleReceiver
-	// The name should be chosen in such a way that different instances of SampleReceiver can be distinguished
-	r.name = fmt.Sprintf("AppMetricReceiver(%s)", name)
-
-	// Set static information
-	r.meta = map[string]string{"source": r.name}
-
-	// Set defaults in r.config
-	// Allow overwriting these defaults by reading config JSON
-	r.config.SocketFile = "/tmp/cc.sock"
-
-	// Read the sample receiver specific JSON config
-	if len(config) > 0 {
-		err := json.Unmarshal(config, &r.config)
-		if err != nil {
-			cclog.ComponentError(r.name, "Error reading config:", err.Error())
-			return nil, err
-		}
-	}
-	if len(r.config.SocketFile) == 0 {
-		cclog.ComponentError(r.name, "Invalid socket_file setting:", r.config.SocketFile)
-		return nil, fmt.Errorf("invalid socket_file setting: %s", r.config.SocketFile)
-	}
-
-	// Check that all required fields in the configuration are set
-	// Use 'if len(r.config.Option) > 0' for strings
-	r.handler = influx.NewMetricHandler()
-	r.parser = influx.NewParser(r.handler)
-	r.parser.SetTimeFunc(DefaultTime)
-
-	return r, nil
-}
--- a/receivers/appMetricReceiver.md
+++ b/receivers/appMetricReceiver.md
@@ -1,23 +0,0 @@
-## `appmetrics` receiver
-
-The `appmetrics` receiver can be used to submit metrics from an application into the monitoring system. It listens for incoming connections on a UNIX socket.
-
-### Configuration structure
-
-```json
-{
-  "<name>": {
-    "type": "appmetrics",
-    "socket_file" : "/tmp/cc.sock",
-  }
-}
-```
-
- `type`: makes the receiver a `appmetrics` receiver
- `socket_file`: Listen UNIX socket
-
-### Inputs from applications
-
-Applcations can connect to the `appmetrics` socket and provide metric in the [InfluxDB line protocol](https://github.com/influxdata/line-protocol). It is currently not possible to submit meta information as the Influx line protocol does not know them.
-
-
--- a/receivers/httpReceiver.go
+++ b/receivers/httpReceiver.go
@@ -5,15 +5,14 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io"
 	"net/http"
 	"strings"
 	"sync"
+	"time"

 	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
-	"github.com/gorilla/mux"
-	influx "github.com/influxdata/line-protocol"
+	influx "github.com/influxdata/line-protocol/v2/lineprotocol"
 )

 const HTTP_RECEIVER_PORT = "8080"
@@ -23,22 +22,39 @@ type HttpReceiverConfig struct {
 	Addr string `json:"address"`
 	Port string `json:"port"`
 	Path string `json:"path"`
+
+	// Maximum amount of time to wait for the next request when keep-alives are enabled
+	// should be larger than the measurement interval to keep the connection open
+	IdleTimeout string `json:"idle_timeout"`
+	idleTimeout time.Duration
+
+	// Controls whether HTTP keep-alives are enabled. By default, keep-alives are enabled
+	KeepAlivesEnabled bool `json:"keep_alives_enabled"`
+
+	// Basic authentication
+	Username     string `json:"username"`
+	Password     string `json:"password"`
+	useBasicAuth bool
 }

 type HttpReceiver struct {
 	receiver
-	handler *influx.MetricHandler
-	parser  *influx.Parser
-	meta    map[string]string
-	config  HttpReceiverConfig
-	router  *mux.Router
-	server  *http.Server
-	wg      sync.WaitGroup
+	meta   map[string]string
+	config HttpReceiverConfig
+	server *http.Server
+	wg     sync.WaitGroup
 }

 func (r *HttpReceiver) Init(name string, config json.RawMessage) error {
 	r.name = fmt.Sprintf("HttpReceiver(%s)", name)
+
+	// Set default values
 	r.config.Port = HTTP_RECEIVER_PORT
+	r.config.KeepAlivesEnabled = true
+	// should be larger than the measurement interval to keep the connection open
+	r.config.IdleTimeout = "120s"
+
+	// Read config
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &r.config)
 		if err != nil {
@@ -49,20 +65,47 @@ func (r *HttpReceiver) Init(name string, config json.RawMessage) error {
 	if len(r.config.Port) == 0 {
 		return errors.New("not all configuration variables set required by HttpReceiver")
 	}
+
+	// Check idle timeout config
+	if len(r.config.IdleTimeout) > 0 {
+		t, err := time.ParseDuration(r.config.IdleTimeout)
+		if err == nil {
+			cclog.ComponentDebug(r.name, "idleTimeout", t)
+			r.config.idleTimeout = t
+		}
+	}
+
+	// Check basic authentication config
+	if len(r.config.Username) > 0 || len(r.config.Password) > 0 {
+		r.config.useBasicAuth = true
+	}
+	if r.config.useBasicAuth && len(r.config.Username) == 0 {
+		return errors.New("basic authentication requires username")
+	}
+	if r.config.useBasicAuth && len(r.config.Password) == 0 {
+		return errors.New("basic authentication requires password")
+	}
+
 	r.meta = map[string]string{"source": r.name}
 	p := r.config.Path
 	if !strings.HasPrefix(p, "/") {
 		p = "/" + p
 	}
-	uri := fmt.Sprintf("%s:%s%s", r.config.Addr, r.config.Port, p)
-	cclog.ComponentDebug(r.name, "INIT", uri)
-	r.handler = influx.NewMetricHandler()
-	r.parser = influx.NewParser(r.handler)
-	r.parser.SetTimeFunc(DefaultTime)
+	addr := fmt.Sprintf("%s:%s", r.config.Addr, r.config.Port)
+	uri := addr + p
+	cclog.ComponentDebug(r.name, "INIT", "listen on:", uri)
+
+	// Register handler function r.ServerHttp for path p in the DefaultServeMux
+	http.HandleFunc(p, r.ServerHttp)
+
+	// Create http server
+	r.server = &http.Server{
+		Addr:        addr,
+		Handler:     nil, // handler to invoke, http.DefaultServeMux if nil
+		IdleTimeout: r.config.idleTimeout,
+	}
+	r.server.SetKeepAlivesEnabled(r.config.KeepAlivesEnabled)

-	r.router = mux.NewRouter()
-	r.router.Path(p).HandlerFunc(r.ServerHttp)
-	r.server = &http.Server{Addr: uri, Handler: r.router}
 	return nil
 }

@@ -79,31 +122,97 @@ func (r *HttpReceiver) Start() {
 }

 func (r *HttpReceiver) ServerHttp(w http.ResponseWriter, req *http.Request) {
+
+	// Check request method, only post method is handled
 	if req.Method != http.MethodPost {
 		http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
 		return
 	}

-	body, err := io.ReadAll(req.Body)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-		return
-	}
-	metrics, err := r.parser.Parse(body)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+	// Check basic authentication
+	if r.config.useBasicAuth {
+		username, password, ok := req.BasicAuth()
+		if !ok || username != r.config.Username || password != r.config.Password {
+			http.Error(w, "Unauthorized", http.StatusUnauthorized)
+			return
+		}
 	}

-	for _, m := range metrics {
-		y := lp.FromInfluxMetric(m)
-		for k, v := range r.meta {
-			y.AddMeta(k, v)
+	d := influx.NewDecoder(req.Body)
+	for d.Next() {
+
+		// Decode measurement name
+		measurement, err := d.Measurement()
+		if err != nil {
+			msg := "ServerHttp: Failed to decode measurement: " + err.Error()
+			cclog.ComponentError(r.name, msg)
+			http.Error(w, msg, http.StatusInternalServerError)
+			return
 		}
+
+		// Decode tags
+		tags := make(map[string]string)
+		for {
+			key, value, err := d.NextTag()
+			if err != nil {
+				msg := "ServerHttp: Failed to decode tag: " + err.Error()
+				cclog.ComponentError(r.name, msg)
+				http.Error(w, msg, http.StatusInternalServerError)
+				return
+			}
+			if key == nil {
+				break
+			}
+			tags[string(key)] = string(value)
+		}
+
+		// Decode fields
+		fields := make(map[string]interface{})
+		for {
+			key, value, err := d.NextField()
+			if err != nil {
+				msg := "ServerHttp: Failed to decode field: " + err.Error()
+				cclog.ComponentError(r.name, msg)
+				http.Error(w, msg, http.StatusInternalServerError)
+				return
+			}
+			if key == nil {
+				break
+			}
+			fields[string(key)] = value.Interface()
+		}
+
+		// Decode time stamp
+		t, err := d.Time(influx.Nanosecond, time.Time{})
+		if err != nil {
+			msg := "ServerHttp: Failed to decode time stamp: " + err.Error()
+			cclog.ComponentError(r.name, msg)
+			http.Error(w, msg, http.StatusInternalServerError)
+			return
+		}
+
+		y, _ := lp.New(
+			string(measurement),
+			tags,
+			r.meta,
+			fields,
+			t,
+		)
+
 		if r.sink != nil {
 			r.sink <- y
 		}
 	}

+	// Check for IO errors
+	err := d.Err()
+	if err != nil {
+		msg := "ServerHttp: Failed to decode: " + err.Error()
+		cclog.ComponentError(r.name, msg)
+		http.Error(w, msg, http.StatusInternalServerError)
+		return
+	}
+
 	w.WriteHeader(http.StatusOK)
 }

--- a/receivers/httpReceiver.md
+++ b/receivers/httpReceiver.md
@@ -10,7 +10,10 @@ The `http` receiver can be used receive metrics through HTTP POST requests.
    "type": "http",
    "address" : "",
    "port" : "8080",
-    "path" : "/write"
+    "path" : "/write",
+    "idle_timeout": "120s",
+    "username": "myUser",
+    "password": "myPW"
  }
 }
 ```
@@ -19,5 +22,22 @@ The `http` receiver can be used receive metrics through HTTP POST requests.
 - `address`: Listen address
 - `port`: Listen port
 - `path`: URL path for the write endpoint
+- `idle_timeout`: Maximum amount of time to wait for the next request when keep-alives are enabled should be larger than the measurement interval to keep the connection open
+- `keep_alives_enabled`: Controls whether HTTP keep-alives are enabled. By default, keep-alives are enabled.
+- `username`: username for basic authentication
+- `password`: password for basic authentication

 The HTTP endpoint listens to `http://<address>:<port>/<path>`
+
+### Debugging
+
+- Install [curl](https://curl.se/)
+- Use curl to send message to `http` receiver
+
+  ```bash
+  curl http://localhost:8080/write \
+  --user "myUser:myPW" \
+  --data \
+  "myMetric,hostname=myHost,type=hwthread,type-id=0,unit=Hz value=400000i 1694777161164284635
+  myMetric,hostname=myHost,type=hwthread,type-id=1,unit=Hz value=400001i 1694777161164284635"
+  ```
--- a/receivers/ipmiReceiver.go
+++ b/receivers/ipmiReceiver.go
@@ -15,6 +15,7 @@ import (

 	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	"github.com/ClusterCockpit/cc-metric-collector/pkg/hostlist"
 )

 type IPMIReceiverClientConfig struct {
@@ -319,12 +320,12 @@ func NewIPMIReceiver(name string, config json.RawMessage) (Receiver, error) {
 		ExcludeMetrics []string `json:"exclude_metrics,omitempty"`

 		ClientConfigs []struct {
-			Fanout     int      `json:"fanout,omitempty"`      // Maximum number of simultaneous IPMI connections (default: 64)
-			DriverType string   `json:"driver_type,omitempty"` // Out of band IPMI driver (default: LAN_2_0)
-			HostList   []string `json:"host_list"`             // List of hosts with the same client configuration
-			Username   *string  `json:"username"`              // User name to authenticate with
-			Password   *string  `json:"password"`              // Password to use for authentication
-			Endpoint   *string  `json:"endpoint"`              // URL of the IPMI service
+			Fanout     int     `json:"fanout,omitempty"`      // Maximum number of simultaneous IPMI connections (default: 64)
+			DriverType string  `json:"driver_type,omitempty"` // Out of band IPMI driver (default: LAN_2_0)
+			HostList   string  `json:"host_list"`             // List of hosts with the same client configuration
+			Username   *string `json:"username"`              // User name to authenticate with
+			Password   *string `json:"password"`              // Password to use for authentication
+			Endpoint   *string `json:"endpoint"`              // URL of the IPMI service

 			// Per client excluded metrics
 			ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
@@ -351,8 +352,9 @@ func NewIPMIReceiver(name string, config json.RawMessage) (Receiver, error) {

 	// Read the IPMI receiver specific JSON config
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &configJSON)
-		if err != nil {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&configJSON); err != nil {
 			cclog.ComponentError(r.name, "Error reading config:", err.Error())
 			return nil, err
 		}
@@ -435,10 +437,17 @@ func NewIPMIReceiver(name string, config json.RawMessage) (Receiver, error) {
 			return nil, err
 		}

-		// Create mapping between ipmi hostname and node hostname
-		// This also guaranties that all ipmi hostnames are uniqu
+		// Create mapping between IPMI host name and node host name
+		// This also guaranties that all IPMI host names are unique
 		ipmi2HostMapping := make(map[string]string)
-		for _, host := range clientConfigJSON.HostList {
+		hostList, err := hostlist.Expand(clientConfigJSON.HostList)
+		if err != nil {
+			err := fmt.Errorf("client config number %d failed to parse host list %s: %v",
+				i, clientConfigJSON.HostList, err)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+		for _, host := range hostList {
 			ipmiHost := strings.Replace(host_pattern, "%h", host, -1)
 			ipmi2HostMapping[ipmiHost] = host
 		}
--- a/receivers/ipmiReceiver.md
+++ b/receivers/ipmiReceiver.md
@@ -12,14 +12,14 @@ The IPMI Receiver uses `ipmi-sensors` from the [FreeIPMI](https://www.gnu.org/so
        "fanout": 256,
        "username": "<Username>",
        "password": "<Password>",
-        "endpoint": "ipmi-sensors://%h-p",
+        "endpoint": "ipmi-sensors://%h-bmc",
        "exclude_metrics": [ "fan_speed", "voltage" ],
        "client_config": [
            {
-                "host_list": ["n1", "n2", "n3", "n4" ]
+                "host_list": "n[1,2-4]"
            },
            {
-                "host_list": [ "n5", "n6" ],
+                "host_list": "n[5-6]",
                "driver_type": "LAN",
                "cli_options": [ "--workaround-flags=..." ],
                "password": "<Password 2>"
--- a/receivers/natsReceiver.go
+++ b/receivers/natsReceiver.go
@@ -8,7 +8,7 @@ import (

 	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
-	influx "github.com/influxdata/line-protocol"
+	influx "github.com/influxdata/line-protocol/v2/lineprotocol"
 	nats "github.com/nats-io/nats.go"
 )

@@ -21,37 +21,85 @@ type NatsReceiverConfig struct {

 type NatsReceiver struct {
 	receiver
-	nc      *nats.Conn
-	handler *influx.MetricHandler
-	parser  *influx.Parser
-	meta    map[string]string
-	config  NatsReceiverConfig
-}
-
-var DefaultTime = func() time.Time {
-	return time.Unix(42, 0)
+	nc     *nats.Conn
+	meta   map[string]string
+	config NatsReceiverConfig
 }

+// Start subscribes to the configured NATS subject
+// Messages wil be handled by r._NatsReceive
 func (r *NatsReceiver) Start() {
 	cclog.ComponentDebug(r.name, "START")
 	r.nc.Subscribe(r.config.Subject, r._NatsReceive)
 }

+// _NatsReceive receives subscribed messages from the NATS server
 func (r *NatsReceiver) _NatsReceive(m *nats.Msg) {
-	metrics, err := r.parser.Parse(m.Data)
-	if err == nil {
-		for _, m := range metrics {
-			y := lp.FromInfluxMetric(m)
-			for k, v := range r.meta {
-				y.AddMeta(k, v)
+
+	d := influx.NewDecoderWithBytes(m.Data)
+	for d.Next() {
+
+		// Decode measurement name
+		measurement, err := d.Measurement()
+		if err != nil {
+			msg := "_NatsReceive: Failed to decode measurement: " + err.Error()
+			cclog.ComponentError(r.name, msg)
+			return
+		}
+
+		// Decode tags
+		tags := make(map[string]string)
+		for {
+			key, value, err := d.NextTag()
+			if err != nil {
+				msg := "_NatsReceive: Failed to decode tag: " + err.Error()
+				cclog.ComponentError(r.name, msg)
+				return
 			}
-			if r.sink != nil {
-				r.sink <- y
+			if key == nil {
+				break
 			}
+			tags[string(key)] = string(value)
+		}
+
+		// Decode fields
+		fields := make(map[string]interface{})
+		for {
+			key, value, err := d.NextField()
+			if err != nil {
+				msg := "_NatsReceive: Failed to decode field: " + err.Error()
+				cclog.ComponentError(r.name, msg)
+				return
+			}
+			if key == nil {
+				break
+			}
+			fields[string(key)] = value.Interface()
+		}
+
+		// Decode time stamp
+		t, err := d.Time(influx.Nanosecond, time.Time{})
+		if err != nil {
+			msg := "_NatsReceive: Failed to decode time: " + err.Error()
+			cclog.ComponentError(r.name, msg)
+			return
+		}
+
+		y, _ := lp.New(
+			string(measurement),
+			tags,
+			r.meta,
+			fields,
+			t,
+		)
+
+		if r.sink != nil {
+			r.sink <- y
 		}
 	}
 }

+// Close closes the connection to the NATS server
 func (r *NatsReceiver) Close() {
 	if r.nc != nil {
 		cclog.ComponentDebug(r.name, "CLOSE")
@@ -59,10 +107,13 @@ func (r *NatsReceiver) Close() {
 	}
 }

+// NewNatsReceiver creates a new Receiver which subscribes to messages from a NATS server
 func NewNatsReceiver(name string, config json.RawMessage) (Receiver, error) {
 	r := new(NatsReceiver)
 	r.name = fmt.Sprintf("NatsReceiver(%s)", name)
-	r.config.Addr = nats.DefaultURL
+
+	// Read configuration file, allow overwriting default config
+	r.config.Addr = "localhost"
 	r.config.Port = "4222"
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &r.config)
@@ -76,17 +127,21 @@ func NewNatsReceiver(name string, config json.RawMessage) (Receiver, error) {
 		len(r.config.Subject) == 0 {
 		return nil, errors.New("not all configuration variables set required by NatsReceiver")
 	}
-	r.meta = map[string]string{"source": r.name}
-	uri := fmt.Sprintf("%s:%s", r.config.Addr, r.config.Port)
-	cclog.ComponentDebug(r.name, "NewNatsReceiver", uri, "Subject", r.config.Subject)
-	if nc, err := nats.Connect(uri); err == nil {
+
+	// Set metadata
+	r.meta = map[string]string{
+		"source": r.name,
+	}
+
+	// Connect to NATS server
+	url := fmt.Sprintf("nats://%s:%s", r.config.Addr, r.config.Port)
+	cclog.ComponentDebug(r.name, "NewNatsReceiver", url, "Subject", r.config.Subject)
+	if nc, err := nats.Connect(url); err == nil {
 		r.nc = nc
 	} else {
 		r.nc = nil
 		return nil, err
 	}
-	r.handler = influx.NewMetricHandler()
-	r.parser = influx.NewParser(r.handler)
-	r.parser.SetTimeFunc(DefaultTime)
+
 	return r, nil
 }
--- a/receivers/natsReceiver.md
+++ b/receivers/natsReceiver.md
@@ -19,3 +19,32 @@ The `nats` receiver can be used receive metrics from the NATS network. The `nats
 - `address`: Address of the NATS control server
 - `port`: Port of the NATS control server
 - `subject`: Subscribes to this subject and receive metrics
+
+### Debugging
+
+- Install NATS server and command line client
+- Start NATS server
+
+  ```bash
+  nats-server --net nats-server.example.org --port 4222
+  ```
+
+- Check NATS server works as expected
+
+  ```bash
+  nats --server=nats-server-db.example.org:4222 server check
+  ```
+
+- Use NATS command line client to subscribe to all messages
+
+  ```bash
+  nats --server=nats-server-db.example.org:4222 sub ">"
+  ```
+
+- Use NATS command line client to send message to NATS receiver
+
+  ```bash
+  nats --server=nats-server-db.example.org:4222 pub subject \
+  "myMetric,hostname=myHost,type=hwthread,type-id=0,unit=Hz value=400000i 1694777161164284635
+  myMetric,hostname=myHost,type=hwthread,type-id=1,unit=Hz value=400001i 1694777161164284635"
+  ```
--- a/receivers/receiveManager.go
+++ b/receivers/receiveManager.go
@@ -11,10 +11,10 @@ import (
 )

 var AvailableReceivers = map[string]func(name string, config json.RawMessage) (Receiver, error){
-	"ipmi":       NewIPMIReceiver,
-	"nats":       NewNatsReceiver,
-	"redfish":    NewRedfishReceiver,
-	"appmetrics": NewAppMetricReceiver,
+	"http":    NewHttpReceiver,
+	"ipmi":    NewIPMIReceiver,
+	"nats":    NewNatsReceiver,
+	"redfish": NewRedfishReceiver,
 }

 type receiveManager struct {
--- a/receivers/redfishReceiver.go
+++ b/receivers/redfishReceiver.go
@@ -1,9 +1,12 @@
 package receivers

 import (
+	"bytes"
 	"crypto/tls"
 	"encoding/json"
 	"fmt"
+	"io"
+	"maps"
 	"net/http"
 	"strconv"
 	"strings"
@@ -12,6 +15,7 @@ import (

 	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	"github.com/ClusterCockpit/cc-metric-collector/pkg/hostlist"

 	// See: https://pkg.go.dev/github.com/stmcginnis/gofish
 	"github.com/stmcginnis/gofish"
@@ -29,10 +33,14 @@ type RedfishReceiverClientConfig struct {

 	doPowerMetric      bool
 	doProcessorMetrics bool
+	doSensors          bool
 	doThermalMetrics   bool

 	skipProcessorMetricsURL map[string]bool

+	// readSensorURLs stores for each chassis ID a list of sensor URLs to read
+	readSensorURLs map[string][]string
+
 	gofish gofish.ClientConfig
 }

@@ -53,7 +61,226 @@ type RedfishReceiver struct {
 	wg   sync.WaitGroup // wait group for redfish receiver
 }

+// deleteEmptyTags removes tags or meta data tags with empty value
+func deleteEmptyTags(tags map[string]string) {
+	maps.DeleteFunc(
+		tags,
+		func(key string, value string) bool {
+			return value == ""
+		},
+	)
+}
+
+// setMetricValue sets the value entry in the fields map
+func setMetricValue(value any) map[string]interface{} {
+	return map[string]interface{}{
+		"value": value,
+	}
+}
+
+// sendMetric sends the metric through the sink channel
+func (r *RedfishReceiver) sendMetric(name string, tags map[string]string, meta map[string]string, value any, timestamp time.Time) {
+
+	deleteEmptyTags(tags)
+	deleteEmptyTags(meta)
+	y, err := lp.New(name, tags, meta, setMetricValue(value), timestamp)
+	if err == nil {
+		r.sink <- y
+	}
+}
+
+// readSensors reads sensors from a redfish device
+// See: https://redfish.dmtf.org/schemas/v1/Sensor.json
+// Redfish URI: /redfish/v1/Chassis/{ChassisId}/Sensors/{SensorId}
+func (r *RedfishReceiver) readSensors(
+	clientConfig *RedfishReceiverClientConfig,
+	chassis *redfish.Chassis) error {
+
+	writeTemperatureSensor := func(sensor *redfish.Sensor) {
+		tags := map[string]string{
+			"hostname": clientConfig.Hostname,
+			"type":     "node",
+			// ChassisType shall indicate the physical form factor for the type of chassis
+			"chassis_typ": string(chassis.ChassisType),
+			// Chassis name
+			"chassis_name": chassis.Name,
+			// ID uniquely identifies the resource
+			"sensor_id": sensor.ID,
+			// The area or device to which this sensor measurement applies
+			"temperature_physical_context": string(sensor.PhysicalContext),
+			// Name
+			"temperature_name": sensor.Name,
+		}
+
+		// Set meta data tags
+		meta := map[string]string{
+			"source": r.name,
+			"group":  "Temperature",
+			"unit":   "degC",
+		}
+
+		r.sendMetric("temperature", tags, meta, sensor.Reading, time.Now())
+	}
+
+	writeFanSpeedSensor := func(sensor *redfish.Sensor) {
+		tags := map[string]string{
+			"hostname": clientConfig.Hostname,
+			"type":     "node",
+			// ChassisType shall indicate the physical form factor for the type of chassis
+			"chassis_typ": string(chassis.ChassisType),
+			// Chassis name
+			"chassis_name": chassis.Name,
+			// ID uniquely identifies the resource
+			"sensor_id": sensor.ID,
+			// The area or device to which this sensor measurement applies
+			"fan_physical_context": string(sensor.PhysicalContext),
+			// Name
+			"fan_name": sensor.Name,
+		}
+
+		// Set meta data tags
+		meta := map[string]string{
+			"source": r.name,
+			"group":  "FanSpeed",
+			"unit":   string(sensor.ReadingUnits),
+		}
+
+		r.sendMetric("fan_speed", tags, meta, sensor.Reading, time.Now())
+	}
+
+	writePowerSensor := func(sensor *redfish.Sensor) {
+		// Set tags
+		tags := map[string]string{
+			"hostname": clientConfig.Hostname,
+			"type":     "node",
+			// ChassisType shall indicate the physical form factor for the type of chassis
+			"chassis_typ": string(chassis.ChassisType),
+			// Chassis name
+			"chassis_name": chassis.Name,
+			// ID uniquely identifies the resource
+			"sensor_id": sensor.ID,
+			// The area or device to which this sensor measurement applies
+			"power_physical_context": string(sensor.PhysicalContext),
+			// Name
+			"power_name": sensor.Name,
+		}
+
+		// Set meta data tags
+		meta := map[string]string{
+			"source": r.name,
+			"group":  "Energy",
+			"unit":   "watts",
+		}
+
+		r.sendMetric("power", tags, meta, sensor.Reading, time.Now())
+	}
+
+	if _, ok := clientConfig.readSensorURLs[chassis.ID]; !ok {
+		// First time run of read sensors for this chassis
+
+		clientConfig.readSensorURLs[chassis.ID] = make([]string, 0)
+
+		// Get sensor information for this chassis
+		sensors, err := chassis.Sensors()
+		if err != nil {
+			return fmt.Errorf("readSensors: chassis.Sensors() failed: %v", err)
+		}
+
+		// Skip empty sensors information
+		if sensors == nil {
+			return nil
+		}
+
+		for _, sensor := range sensors {
+
+			// Skip all sensors which are not in enabled state or which are unhealthy
+			if sensor.Status.State != common.EnabledState || sensor.Status.Health != common.OKHealth {
+				continue
+			}
+
+			// Skip sensors with missing readings units or type
+			if sensor.ReadingUnits == "" || sensor.ReadingType == "" {
+				continue
+			}
+
+			// Power readings
+			if (sensor.ReadingType == redfish.PowerReadingType && sensor.ReadingUnits == "Watts") ||
+				(sensor.ReadingType == redfish.CurrentReadingType && sensor.ReadingUnits == "Watts") {
+				if clientConfig.isExcluded["power"] {
+					continue
+				}
+
+				clientConfig.readSensorURLs[chassis.ID] = append(clientConfig.readSensorURLs[chassis.ID], sensor.ODataID)
+				writePowerSensor(sensor)
+				continue
+			}
+
+			// Fan speed readings
+			if (sensor.ReadingType == redfish.AirFlowReadingType && sensor.ReadingUnits == "RPM") ||
+				(sensor.ReadingType == redfish.AirFlowReadingType && sensor.ReadingUnits == "Percent") {
+				// Skip, when fan_speed metric is excluded
+				if clientConfig.isExcluded["fan_speed"] {
+					continue
+				}
+
+				clientConfig.readSensorURLs[chassis.ID] = append(clientConfig.readSensorURLs[chassis.ID], sensor.ODataID)
+				writeFanSpeedSensor(sensor)
+			}
+
+			// Temperature readings
+			if sensor.ReadingType == redfish.TemperatureReadingType && sensor.ReadingUnits == "C" {
+				if clientConfig.isExcluded["temperature"] {
+					continue
+				}
+
+				clientConfig.readSensorURLs[chassis.ID] = append(clientConfig.readSensorURLs[chassis.ID], sensor.ODataID)
+				writeTemperatureSensor(sensor)
+				continue
+			}
+		}
+	} else {
+
+		common.CollectCollection(
+			func(uri string) {
+				sensor, err := redfish.GetSensor(chassis.GetClient(), uri)
+				if err != nil {
+					cclog.ComponentError(r.name, "redfish.GetSensor() for uri '", uri, "' failed")
+				}
+
+				// Power readings
+				if (sensor.ReadingType == redfish.PowerReadingType && sensor.ReadingUnits == "Watts") ||
+					(sensor.ReadingType == redfish.CurrentReadingType && sensor.ReadingUnits == "Watts") {
+
+					writePowerSensor(sensor)
+					return
+				}
+
+				// Fan speed readings
+				if (sensor.ReadingType == redfish.AirFlowReadingType && sensor.ReadingUnits == "RPM") ||
+					(sensor.ReadingType == redfish.AirFlowReadingType && sensor.ReadingUnits == "Percent") {
+
+					writeFanSpeedSensor(sensor)
+					return
+				}
+
+				// Temperature readings
+				if sensor.ReadingType == redfish.TemperatureReadingType && sensor.ReadingUnits == "C" {
+
+					writeTemperatureSensor(sensor)
+					return
+				}
+			},
+			clientConfig.readSensorURLs[chassis.ID])
+
+	}
+	return nil
+}
+
 // readThermalMetrics reads thermal metrics from a redfish device
+// See: https://redfish.dmtf.org/schemas/v1/Thermal.json
+// Redfish URI: /redfish/v1/Chassis/{ChassisId}/Thermal
+// -> deprecated in favor of the ThermalSubsystem schema
+// -> on Lenovo servers /redfish/v1/Chassis/{ChassisId}/ThermalSubsystem/ThermalMetrics links to /redfish/v1/Chassis/{ChassisId}/Sensors/{SensorId}
 func (r *RedfishReceiver) readThermalMetrics(
 	clientConfig *RedfishReceiverClientConfig,
 	chassis *redfish.Chassis) error {
@@ -103,13 +330,6 @@ func (r *RedfishReceiver) readThermalMetrics(
 			"temperature_name": temperature.Name,
 		}

-		// Delete empty tags
-		for key, value := range tags {
-			if value == "" {
-				delete(tags, key)
-			}
-		}
-
 		// Set meta data tags
 		meta := map[string]string{
 			"source": r.name,
@@ -120,14 +340,7 @@ func (r *RedfishReceiver) readThermalMetrics(
 		// ReadingCelsius shall be the current value of the temperature sensor's reading.
 		value := temperature.ReadingCelsius

-		y, err := lp.New("temperature", tags, meta,
-			map[string]interface{}{
-				"value": value,
-			},
-			timestamp)
-		if err == nil {
-			r.sink <- y
-		}
+		r.sendMetric("temperature", tags, meta, value, timestamp)
 	}

 	for _, fan := range thermal.Fans {
@@ -161,13 +374,6 @@ func (r *RedfishReceiver) readThermalMetrics(
 			"fan_name": fan.Name,
 		}

-		// Delete empty tags
-		for key, value := range tags {
-			if value == "" {
-				delete(tags, key)
-			}
-		}
-
 		// Set meta data tags
 		meta := map[string]string{
 			"source": r.name,
@@ -175,23 +381,16 @@ func (r *RedfishReceiver) readThermalMetrics(
 			"unit":   string(fan.ReadingUnits),
 		}

-		// Reading shall be the current value of the fan sensor's reading
-		value := fan.Reading
-
-		y, err := lp.New("fan_speed", tags, meta,
-			map[string]interface{}{
-				"value": value,
-			},
-			timestamp)
-		if err == nil {
-			r.sink <- y
-		}
+		r.sendMetric("fan_speed", tags, meta, fan.Reading, timestamp)
 	}

 	return nil
 }

 // readPowerMetrics reads power metrics from a redfish device
+// See: https://redfish.dmtf.org/schemas/v1/Power.json
+// Redfish URI: /redfish/v1/Chassis/{ChassisId}/Power
+// -> deprecated in favor of the PowerSubsystem schema
 func (r *RedfishReceiver) readPowerMetrics(
 	clientConfig *RedfishReceiverClientConfig,
 	chassis *redfish.Chassis) error {
@@ -271,13 +470,6 @@ func (r *RedfishReceiver) readPowerMetrics(
 			"power_control_name": pc.Name,
 		}

-		// Delete empty tags
-		for key, value := range tags {
-			if value == "" {
-				delete(tags, key)
-			}
-		}
-
 		// Set meta data tags
 		meta := map[string]string{
 			"source":              r.name,
@@ -286,23 +478,8 @@ func (r *RedfishReceiver) readPowerMetrics(
 			"unit":                "watts",
 		}

-		// Delete empty meta data tags
-		for key, value := range meta {
-			if value == "" {
-				delete(meta, key)
-			}
-		}
-
 		for name, value := range metrics {
-
-			y, err := lp.New(name, tags, meta,
-				map[string]interface{}{
-					"value": value,
-				},
-				timestamp)
-			if err == nil {
-				r.sink <- y
-			}
+			r.sendMetric(name, tags, meta, value, timestamp)
 		}
 	}

@@ -311,6 +488,7 @@ func (r *RedfishReceiver) readPowerMetrics(

 // readProcessorMetrics reads processor metrics from a redfish device
 // See: https://redfish.dmtf.org/schemas/v1/ProcessorMetrics.json
+// Redfish URI: /redfish/v1/Systems/{ComputerSystemId}/Processors/{ProcessorId}/ProcessorMetrics
 func (r *RedfishReceiver) readProcessorMetrics(
 	clientConfig *RedfishReceiverClientConfig,
 	processor *redfish.Processor) error {
@@ -325,7 +503,7 @@ func (r *RedfishReceiver) readProcessorMetrics(
 		return nil
 	}

-	resp, err := processor.Client.Get(URL)
+	resp, err := processor.GetClient().Get(URL)
 	if err != nil {
 		// Skip non existing URLs
 		if statusCode := err.(*common.Error).HTTPReturnedStatusCode; statusCode == http.StatusNotFound {
@@ -333,7 +511,7 @@ func (r *RedfishReceiver) readProcessorMetrics(
 			return nil
 		}

-		return fmt.Errorf("processor.Client.Get(%v) failed: %+w", URL, err)
+		return fmt.Errorf("processor.GetClient().Get(%v) failed: %+w", URL, err)
 	}

 	var processorMetrics struct {
@@ -346,11 +524,18 @@ func (r *RedfishReceiver) readProcessorMetrics(
 		// This property shall contain the temperature, in Celsius, of the processor.
 		TemperatureCelsius float32 `json:"TemperatureCelsius"`
 	}
-	err = json.NewDecoder(resp.Body).Decode(&processorMetrics)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return fmt.Errorf("unable to decode JSON for processor metrics: %+w", err)
+		return fmt.Errorf("unable to read response body for processor metrics: %+w", err)
+	}
+	err = json.Unmarshal(body, &processorMetrics)
+	if err != nil {
+		return fmt.Errorf(
+			"unable to unmarshal JSON='%s' for processor metrics: %+w",
+			string(body),
+			err,
+		)
 	}
-	processorMetrics.SetClient(processor.Client)

 	// Set tags
 	tags := map[string]string{
@@ -364,13 +549,6 @@ func (r *RedfishReceiver) readProcessorMetrics(
 		"processor_id": processor.ID,
 	}

-	// Delete empty tags
-	for key, value := range tags {
-		if value == "" {
-			delete(tags, key)
-		}
-	}
-
 	// Set meta data tags
 	metaPower := map[string]string{
 		"source": r.name,
@@ -380,15 +558,10 @@ func (r *RedfishReceiver) readProcessorMetrics(

 	namePower := "consumed_power"

-	if !clientConfig.isExcluded[namePower] {
-		y, err := lp.New(namePower, tags, metaPower,
-			map[string]interface{}{
-				"value": processorMetrics.ConsumedPowerWatt,
-			},
-			timestamp)
-		if err == nil {
-			r.sink <- y
-		}
+	if !clientConfig.isExcluded[namePower] &&
+		// Some servers return "ConsumedPowerWatt":65535 instead of "ConsumedPowerWatt":null
+		processorMetrics.ConsumedPowerWatt != 65535 {
+		r.sendMetric(namePower, tags, metaPower, processorMetrics.ConsumedPowerWatt, timestamp)
 	}
 	// Set meta data tags
 	metaThermal := map[string]string{
@@ -400,14 +573,7 @@ func (r *RedfishReceiver) readProcessorMetrics(
 	nameThermal := "temperature"

 	if !clientConfig.isExcluded[nameThermal] {
-		y, err := lp.New(nameThermal, tags, metaThermal,
-			map[string]interface{}{
-				"value": processorMetrics.TemperatureCelsius,
-			},
-			timestamp)
-		if err == nil {
-			r.sink <- y
-		}
+		r.sendMetric(nameThermal, tags, metaThermal, processorMetrics.TemperatureCelsius, timestamp)
 	}
 	return nil
 }
@@ -440,7 +606,8 @@ func (r *RedfishReceiver) readMetrics(clientConfig *RedfishReceiverClientConfig)

 	// Get all chassis managed by this service
 	isChassisListRequired :=
-		clientConfig.doThermalMetrics ||
+		clientConfig.doSensors ||
+			clientConfig.doThermalMetrics ||
 			clientConfig.doPowerMetric
 	var chassisList []*redfish.Chassis
 	if isChassisListRequired {
@@ -460,6 +627,16 @@ func (r *RedfishReceiver) readMetrics(clientConfig *RedfishReceiverClientConfig)
 		}
 	}

+	// Read sensors
+	if clientConfig.doSensors {
+		for _, chassis := range chassisList {
+			err := r.readSensors(clientConfig, chassis)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
 	// read thermal metrics
 	if clientConfig.doThermalMetrics {
 		for _, chassis := range chassisList {
@@ -624,20 +801,22 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
 		// Globally disable collection of power, processor or thermal metrics
 		DisablePowerMetrics     bool `json:"disable_power_metrics"`
 		DisableProcessorMetrics bool `json:"disable_processor_metrics"`
+		DisableSensors          bool `json:"disable_sensors"`
 		DisableThermalMetrics   bool `json:"disable_thermal_metrics"`

 		// Globally excluded metrics
 		ExcludeMetrics []string `json:"exclude_metrics,omitempty"`

 		ClientConfigs []struct {
-			HostList []string `json:"host_list"` // List of hosts with the same client configuration
-			Username *string  `json:"username"`  // User name to authenticate with
-			Password *string  `json:"password"`  // Password to use for authentication
-			Endpoint *string  `json:"endpoint"`  // URL of the redfish service
+			HostList string  `json:"host_list"` // List of hosts with the same client configuration
+			Username *string `json:"username"`  // User name to authenticate with
+			Password *string `json:"password"`  // Password to use for authentication
+			Endpoint *string `json:"endpoint"`  // URL of the redfish service

 			// Per client disable collection of power,processor or thermal metrics
 			DisablePowerMetrics     bool `json:"disable_power_metrics"`
 			DisableProcessorMetrics bool `json:"disable_processor_metrics"`
+			DisableSensors          bool `json:"disable_sensors"`
 			DisableThermalMetrics   bool `json:"disable_thermal_metrics"`

 			// Per client excluded metrics
@@ -660,8 +839,9 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {

 	// Read the redfish receiver specific JSON config
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &configJSON)
-		if err != nil {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&configJSON); err != nil {
 			cclog.ComponentError(r.name, "Error reading config:", err.Error())
 			return nil, err
 		}
@@ -710,6 +890,7 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {

 		clientConfigJSON := &configJSON.ClientConfigs[i]

+		// Redfish endpoint
 		var endpoint_pattern string
 		if clientConfigJSON.Endpoint != nil {
 			endpoint_pattern = *clientConfigJSON.Endpoint
@@ -721,6 +902,7 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
 			return nil, err
 		}

+		// Redfish username
 		var username string
 		if clientConfigJSON.Username != nil {
 			username = *clientConfigJSON.Username
@@ -732,6 +914,7 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
 			return nil, err
 		}

+		// Redfish password
 		var password string
 		if clientConfigJSON.Password != nil {
 			password = *clientConfigJSON.Password
@@ -750,6 +933,9 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
 		doProcessorMetrics :=
 			!(configJSON.DisableProcessorMetrics ||
 				clientConfigJSON.DisableProcessorMetrics)
+		doSensors :=
+			!(configJSON.DisableSensors ||
+				clientConfigJSON.DisableSensors)
 		doThermalMetrics :=
 			!(configJSON.DisableThermalMetrics ||
 				clientConfigJSON.DisableThermalMetrics)
@@ -763,7 +949,14 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
 			isExcluded[key] = true
 		}

-		for _, host := range clientConfigJSON.HostList {
+		hostList, err := hostlist.Expand(clientConfigJSON.HostList)
+		if err != nil {
+			err := fmt.Errorf("client config number %d failed to parse host list %s: %v",
+				i, clientConfigJSON.HostList, err)
+			cclog.ComponentError(r.name, err)
+			return nil, err
+		}
+		for _, host := range hostList {

 			// Endpoint of the redfish service
 			endpoint := strings.Replace(endpoint_pattern, "%h", host, -1)
@@ -775,8 +968,10 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
 					isExcluded:              isExcluded,
 					doPowerMetric:           doPowerMetric,
 					doProcessorMetrics:      doProcessorMetrics,
+					doSensors:               doSensors,
 					doThermalMetrics:        doThermalMetrics,
 					skipProcessorMetricsURL: make(map[string]bool),
+					readSensorURLs:          map[string][]string{},
 					gofish: gofish.ClientConfig{
 						Username:   username,
 						Password:   password,
@@ -795,6 +990,7 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
 		r.config.fanout = numClients
 	}

+	// Check that at least on client config exists
 	if numClients == 0 {
 		err := fmt.Errorf("at least one client config is required")
 		cclog.ComponentError(r.name, err)
--- a/receivers/redfishReceiver.md
+++ b/receivers/redfishReceiver.md
@@ -8,24 +8,26 @@ The Redfish receiver uses the [Redfish (specification)](https://www.dmtf.org/sta
 {
    "<redfish receiver name>": {
        "type": "redfish",
-        "username": "<user A>",
-        "password": "<password A>",
+        "username": "<Username>",
+        "password": "<Password>",
        "endpoint": "https://%h-bmc",
        "exclude_metrics": [ "min_consumed_watts" ],
        "client_config": [
            {
-                "host_list": [ "<host 1>", "<host 2>" ]
+                "host_list": "n[1,2-4]"
            },
            {
-                "host_list": [ "<host 3>", "<host 4>" ]
-                "disable_power_metrics": true
-            },
-            {
-                "host_list": [ "<host 5>" ],
-                "username": "<user B>",
-                "password": "<password B>",
-                "endpoint": "https://%h-BMC",
+                "host_list": "n5",
+                "disable_power_metrics": true,
+                "disable_processor_metrics": true,
                "disable_thermal_metrics": true
+            },
+            {
+                "host_list": "n6" ],
+                "username": "<Username 2>",
+                "password": "<Password 2>",
+                "endpoint": "https://%h-BMC",
+                "disable_sensor_metrics": true
            }
        ]
    }
@@ -41,9 +43,18 @@ Global settings:

 Global and per redfish device settings (per redfish device settings overwrite the global settings):

- `disable_power_metrics`: disable collection of power metrics
- `disable_processor_metrics`: disable collection of processor metrics
- `disable_thermal_metrics`: disable collection of thermal metrics
+- `disable_power_metrics`:
+  disable collection of power metrics
+  (`/redfish/v1/Chassis/{ChassisId}/Power`)
+- `disable_processor_metrics`:
+  disable collection of processor metrics
+  (`/redfish/v1/Systems/{ComputerSystemId}/Processors/{ProcessorId}/ProcessorMetrics`)
+- `disable_sensors`:
+  disable collection of fan, power and thermal sensor metrics
+  (`/redfish/v1/Chassis/{ChassisId}/Sensors/{SensorId}`)
+- `disable_thermal_metrics`:
+  disable collection of thermal metrics
+  (`/redfish/v1/Chassis/{ChassisId}/Thermal`)
 - `exclude_metrics`: list of excluded metrics
 - `username`: User name to authenticate with
 - `password`: Password to use for authentication
--- a/scripts/cc-metric-collector.init
+++ b/scripts/cc-metric-collector.init
@@ -25,7 +25,7 @@ CC_USER=clustercockpit
 CC_GROUP=clustercockpit
 CONF_DIR=/etc/cc-metric-collector
 PID_FILE=/var/run/$NAME.pid
-DAEMON=/usr/sbin/$NAME
+DAEMON=/usr/bin/$NAME
 CONF_FILE=${CONF_DIR}/cc-metric-collector.json

 umask 0027
--- a/scripts/cc-metric-collector.service
+++ b/scripts/cc-metric-collector.service
@@ -3,7 +3,6 @@ Description=ClusterCockpit metric collector
 Documentation=https://github.com/ClusterCockpit/cc-metric-collector
 Wants=network-online.target
 After=network-online.target
-After=postgresql.service mariadb.service mysql.service

 [Service]
 EnvironmentFile=/etc/default/cc-metric-collector
@@ -14,7 +13,7 @@ Restart=on-failure
 WorkingDirectory=/tmp
 RuntimeDirectory=cc-metric-collector
 RuntimeDirectoryMode=0750
-ExecStart=/usr/sbin/cc-metric-collector --config=${CONF_FILE}
+ExecStart=/usr/bin/cc-metric-collector --config=${CONF_FILE}
 LimitNOFILE=10000
 TimeoutStopSec=20
 UMask=0027
--- a/scripts/cc-metric-collector.spec
+++ b/scripts/cc-metric-collector.spec
@@ -10,6 +10,8 @@ BuildRequires:  go-toolset
 BuildRequires:  systemd-rpm-macros
 # for header downloads
 BuildRequires:  wget
+# Recommended when using the sysusers_create_package macro
+Requires(pre): /usr/bin/systemd-sysusers

 Provides:       %{name} = %{version}

@@ -27,7 +29,7 @@ make


 %install
-install -Dpm 0750 %{name} %{buildroot}%{_sbindir}/%{name}
+install -Dpm 0750 %{name} %{buildroot}%{_bindir}/%{name}
 install -Dpm 0600 config.json %{buildroot}%{_sysconfdir}/%{name}/%{name}.json
 install -Dpm 0600 collectors.json %{buildroot}%{_sysconfdir}/%{name}/collectors.json
 install -Dpm 0600 sinks.json %{buildroot}%{_sysconfdir}/%{name}/sinks.json
@@ -42,7 +44,7 @@ install -Dpm 0644 scripts/%{name}.sysusers %{buildroot}%{_sysusersdir}/%{name}.c
 # go test should be here... :)

 %pre
-%sysusers_create_package scripts/%{name}.sysusers
+%sysusers_create_package %{name} scripts/%{name}.sysusers

 %post
 %systemd_post %{name}.service
@@ -52,7 +54,7 @@ install -Dpm 0644 scripts/%{name}.sysusers %{buildroot}%{_sysusersdir}/%{name}.c

 %files
 # Binary
-%attr(-,clustercockpit,clustercockpit) %{_sbindir}/%{name}
+%attr(-,clustercockpit,clustercockpit) %{_bindir}/%{name}
 # Config
 %dir %{_sysconfdir}/%{name}
 %attr(0600,clustercockpit,clustercockpit) %config(noreplace) %{_sysconfdir}/%{name}/%{name}.json
--- a/scripts/likwid_perfgroup_to_cc_config.py
+++ b/scripts/likwid_perfgroup_to_cc_config.py
@@ -45,7 +45,7 @@ def group_to_json(groupfile):
            if "PWR" in calc:
                scope = "socket"

-            m = {"name" : metric, "calc": calc, "scope" : scope, "publish" : True}
+            m = {"name" : metric, "calc": calc, "type" : scope, "publish" : True}
            metrics.append(m)
    return {"events" : events, "metrics" : metrics}

--- a/sinks/gangliaSink.go
+++ b/sinks/gangliaSink.go
@@ -1,6 +1,7 @@
 package sinks

 import (
+	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -94,9 +95,10 @@ func NewGangliaSink(name string, config json.RawMessage) (Sink, error) {
 	s.config.AddTagsAsDesc = false
 	s.config.AddGangliaGroup = false
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &s.config)
-		if err != nil {
-			cclog.ComponentError(s.name, "Error reading config for", s.name, ":", err.Error())
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
 			return nil, err
 		}
 	}
--- a/sinks/httpSink.go
+++ b/sinks/httpSink.go
@@ -11,79 +11,199 @@ import (

 	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
-	influx "github.com/influxdata/line-protocol"
+	influx "github.com/influxdata/line-protocol/v2/lineprotocol"
+	"golang.org/x/exp/slices"
 )

 type HttpSinkConfig struct {
 	defaultSinkConfig
-	URL             string `json:"url,omitempty"`
-	JWT             string `json:"jwt,omitempty"`
-	Timeout         string `json:"timeout,omitempty"`
+
+	// The full URL of the endpoint
+	URL string `json:"url"`
+
+	// JSON web tokens for authentication (Using the *Bearer* scheme)
+	JWT string `json:"jwt,omitempty"`
+
+	// Basic authentication
+	Username     string `json:"username"`
+	Password     string `json:"password"`
+	useBasicAuth bool
+
+	// time limit for requests made by the http client
+	Timeout string `json:"timeout,omitempty"`
+	timeout time.Duration
+
+	// Maximum amount of time an idle (keep-alive) connection will remain idle before closing itself
+	// should be larger than the measurement interval to keep the connection open
 	IdleConnTimeout string `json:"idle_connection_timeout,omitempty"`
-	FlushDelay      string `json:"flush_delay,omitempty"`
-	MaxRetries      int    `json:"max_retries,omitempty"`
+	idleConnTimeout time.Duration
+
+	// Batch all writes arriving in during this duration
+	// (default '5s', batching can be disabled by setting it to 0)
+	FlushDelay string `json:"flush_delay,omitempty"`
+	flushDelay time.Duration
+
+	// Maximum number of retries to connect to the http server (default: 3)
+	MaxRetries int `json:"max_retries,omitempty"`
+
+	// Timestamp precision
+	Precision string `json:"precision,omitempty"`
+}
+
+type key_value_pair struct {
+	key   string
+	value string
 }

 type HttpSink struct {
 	sink
-	client          *http.Client
-	encoder         *influx.Encoder
-	lock            sync.Mutex // Flush() runs in another goroutine, so this lock has to protect the buffer
-	buffer          *bytes.Buffer
-	flushTimer      *time.Timer
-	config          HttpSinkConfig
-	idleConnTimeout time.Duration
-	timeout         time.Duration
-	flushDelay      time.Duration
+	client *http.Client
+	// influx line protocol encoder
+	encoder influx.Encoder
+	// List of tags and meta data tags which should be used as tags
+	extended_tag_list []key_value_pair
+	// Flush() runs in another goroutine and accesses the influx line protocol encoder,
+	// so this encoderLock has to protect the encoder
+	encoderLock sync.Mutex
+
+	// timer to run Flush()
+	flushTimer *time.Timer
+	// Lock to assure that only one timer is running at a time
+	timerLock sync.Mutex
+
+	config HttpSinkConfig
 }

+// Write sends metric m as http message
 func (s *HttpSink) Write(m lp.CCMetric) error {
-	p := m.ToPoint(s.meta_as_tags)
-	s.lock.Lock()
-	firstWriteOfBatch := s.buffer.Len() == 0
-	_, err := s.encoder.Encode(p)
-	s.lock.Unlock()
+
+	// Lock for encoder usage
+	s.encoderLock.Lock()
+
+	// Encode measurement name
+	s.encoder.StartLine(m.Name())
+
+	// copy tags and meta data which should be used as tags
+	s.extended_tag_list = s.extended_tag_list[:0]
+	for key, value := range m.Tags() {
+		s.extended_tag_list =
+			append(
+				s.extended_tag_list,
+				key_value_pair{
+					key:   key,
+					value: value,
+				},
+			)
+	}
+	for _, key := range s.config.MetaAsTags {
+		if value, ok := m.GetMeta(key); ok {
+			s.extended_tag_list =
+				append(
+					s.extended_tag_list,
+					key_value_pair{
+						key:   key,
+						value: value,
+					},
+				)
+		}
+	}
+
+	// Encode tags (they musts be in lexical order)
+	slices.SortFunc(
+		s.extended_tag_list,
+		func(a key_value_pair, b key_value_pair) int {
+			if a.key < b.key {
+				return -1
+			}
+			if a.key > b.key {
+				return +1
+			}
+			return 0
+		},
+	)
+	for i := range s.extended_tag_list {
+		s.encoder.AddTag(
+			s.extended_tag_list[i].key,
+			s.extended_tag_list[i].value,
+		)
+	}
+
+	// Encode fields
+	for key, value := range m.Fields() {
+		s.encoder.AddField(key, influx.MustNewValue(value))
+	}
+
+	// Encode time stamp
+	s.encoder.EndLine(m.Time())
+
+	// Check for encoder errors
+	err := s.encoder.Err()
+
+	// Unlock encoder usage
+	s.encoderLock.Unlock()
+
+	// Check that encoding worked
 	if err != nil {
-		cclog.ComponentError(s.name, "encoding failed:", err.Error())
-		return err
+		return fmt.Errorf("encoding failed: %v", err)
 	}

-	if s.flushDelay == 0 {
+	if s.config.flushDelay == 0 {
+
+		// Directly flush if no flush delay is configured
 		return s.Flush()
-	}
+	} else if s.timerLock.TryLock() {

-	if firstWriteOfBatch {
-		if s.flushTimer == nil {
-			s.flushTimer = time.AfterFunc(s.flushDelay, func() {
-				if err := s.Flush(); err != nil {
-					cclog.ComponentError(s.name, "flush failed:", err.Error())
-				}
-			})
+		// Setup flush timer when flush delay is configured
+		// and no other timer is already running
+		if s.flushTimer != nil {
+
+			// Restarting existing flush timer
+			cclog.ComponentDebug(s.name, "Write(): Restarting flush timer")
+			s.flushTimer.Reset(s.config.flushDelay)
 		} else {
-			s.flushTimer.Reset(s.flushDelay)
+
+			// Creating and starting flush timer
+			cclog.ComponentDebug(s.name, "Write(): Starting new flush timer")
+			s.flushTimer = time.AfterFunc(
+				s.config.flushDelay,
+				func() {
+					defer s.timerLock.Unlock()
+					cclog.ComponentDebug(s.name, "Starting flush triggered by flush timer")
+					if err := s.Flush(); err != nil {
+						cclog.ComponentError(s.name, "Flush triggered by flush timer: flush failed:", err)
+					}
+				})
 		}
 	}

 	return nil
 }

+// Flush sends all metrics stored in encoder to HTTP server
 func (s *HttpSink) Flush() error {
-	// Own lock for as short as possible: the time it takes to copy the buffer.
-	s.lock.Lock()
-	buf := make([]byte, s.buffer.Len())
-	copy(buf, s.buffer.Bytes())
-	s.buffer.Reset()
-	s.lock.Unlock()
+
+	// Lock for encoder usage
+	// Own lock for as short as possible: the time it takes to clone the buffer.
+	s.encoderLock.Lock()
+
+	buf := slices.Clone(s.encoder.Bytes())
+	s.encoder.Reset()
+
+	// Unlock encoder usage
+	s.encoderLock.Unlock()
+
 	if len(buf) == 0 {
 		return nil
 	}

+	cclog.ComponentDebug(s.name, "Flush(): Flushing")
+
 	var res *http.Response
 	for i := 0; i < s.config.MaxRetries; i++ {
 		// Create new request to send buffer
 		req, err := http.NewRequest(http.MethodPost, s.config.URL, bytes.NewReader(buf))
 		if err != nil {
-			cclog.ComponentError(s.name, "failed to create request:", err.Error())
+			cclog.ComponentError(s.name, "Flush(): Failed to create HTTP request:", err)
 			return err
 		}

@@ -92,10 +212,15 @@ func (s *HttpSink) Flush() error {
 			req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", s.config.JWT))
 		}

+		// Set basic authentication
+		if s.config.useBasicAuth {
+			req.SetBasicAuth(s.config.Username, s.config.Password)
+		}
+
 		// Do request
 		res, err = s.client.Do(req)
 		if err != nil {
-			cclog.ComponentError(s.name, "transport/tcp error:", err.Error())
+			cclog.ComponentError(s.name, "Flush(): transport/tcp error:", err)
 			// Wait between retries
 			time.Sleep(time.Duration(i+1) * (time.Second / 2))
 			continue
@@ -111,7 +236,7 @@ func (s *HttpSink) Flush() error {
 	// Handle application errors
 	if res.StatusCode != http.StatusOK {
 		err := errors.New(res.Status)
-		cclog.ComponentError(s.name, "application error:", err.Error())
+		cclog.ComponentError(s.name, "Flush(): Application error:", err)
 		return err
 	}

@@ -119,62 +244,107 @@ func (s *HttpSink) Flush() error {
 }

 func (s *HttpSink) Close() {
-	s.flushTimer.Stop()
-	if err := s.Flush(); err != nil {
-		cclog.ComponentError(s.name, "flush failed:", err.Error())
+	cclog.ComponentDebug(s.name, "Closing HTTP connection")
+
+	// Stop existing timer and immediately flush
+	if s.flushTimer != nil {
+		if ok := s.flushTimer.Stop(); ok {
+			s.timerLock.Unlock()
+		}
 	}
+
+	// Flush
+	if err := s.Flush(); err != nil {
+		cclog.ComponentError(s.name, "Close(): Flush failed:", err)
+	}
+
 	s.client.CloseIdleConnections()
 }

+// NewHttpSink creates a new http sink
 func NewHttpSink(name string, config json.RawMessage) (Sink, error) {
 	s := new(HttpSink)
 	// Set default values
 	s.name = fmt.Sprintf("HttpSink(%s)", name)
-	s.config.IdleConnTimeout = "120s" // should be larger than the measurement interval.
+	// should be larger than the measurement interval to keep the connection open
+	s.config.IdleConnTimeout = "120s"
 	s.config.Timeout = "5s"
 	s.config.FlushDelay = "5s"
 	s.config.MaxRetries = 3
+	s.config.Precision = "ns"
+	cclog.ComponentDebug(s.name, "Init()")

 	// Read config
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &s.config)
-		if err != nil {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
 			return nil, err
 		}
 	}
 	if len(s.config.URL) == 0 {
 		return nil, errors.New("`url` config option is required for HTTP sink")
 	}
+
+	// Check basic authentication config
+	if len(s.config.Username) > 0 || len(s.config.Password) > 0 {
+		s.config.useBasicAuth = true
+	}
+	if s.config.useBasicAuth && len(s.config.Username) == 0 {
+		return nil, errors.New("basic authentication requires username")
+	}
+	if s.config.useBasicAuth && len(s.config.Password) == 0 {
+		return nil, errors.New("basic authentication requires password")
+	}
+
 	if len(s.config.IdleConnTimeout) > 0 {
 		t, err := time.ParseDuration(s.config.IdleConnTimeout)
 		if err == nil {
-			s.idleConnTimeout = t
+			cclog.ComponentDebug(s.name, "Init(): idleConnTimeout", t)
+			s.config.idleConnTimeout = t
 		}
 	}
 	if len(s.config.Timeout) > 0 {
 		t, err := time.ParseDuration(s.config.Timeout)
 		if err == nil {
-			s.timeout = t
+			s.config.timeout = t
+			cclog.ComponentDebug(s.name, "Init(): timeout", t)
 		}
 	}
 	if len(s.config.FlushDelay) > 0 {
 		t, err := time.ParseDuration(s.config.FlushDelay)
 		if err == nil {
-			s.flushDelay = t
+			s.config.flushDelay = t
+			cclog.ComponentDebug(s.name, "Init(): flushDelay", t)
 		}
 	}
-	// Create lookup map to use meta infos as tags in the output metric
-	s.meta_as_tags = make(map[string]bool)
-	for _, k := range s.config.MetaAsTags {
-		s.meta_as_tags[k] = true
+	precision := influx.Nanosecond
+	if len(s.config.Precision) > 0 {
+		switch s.config.Precision {
+		case "s":
+			precision = influx.Second
+		case "ms":
+			precision = influx.Millisecond
+		case "us":
+			precision = influx.Microsecond
+		case "ns":
+			precision = influx.Nanosecond
+		}
 	}
-	tr := &http.Transport{
-		MaxIdleConns:    1, // We will only ever talk to one host.
-		IdleConnTimeout: s.idleConnTimeout,
+
+	// Create http client
+	s.client = &http.Client{
+		Transport: &http.Transport{
+			MaxIdleConns:    1, // We will only ever talk to one host.
+			IdleConnTimeout: s.config.idleConnTimeout,
+		},
+		Timeout: s.config.timeout,
 	}
-	s.client = &http.Client{Transport: tr, Timeout: s.timeout}
-	s.buffer = &bytes.Buffer{}
-	s.encoder = influx.NewEncoder(s.buffer)
-	s.encoder.SetPrecision(time.Second)
+
+	// Configure influx line protocol encoder
+	s.encoder.SetPrecision(precision)
+	s.extended_tag_list = make([]key_value_pair, 0)
+
 	return s, nil
 }
--- a/sinks/httpSink.md
+++ b/sinks/httpSink.md
@@ -8,22 +8,35 @@ The `http` sink uses POST requests to a HTTP server to submit the metrics in the
 {
  "<name>": {
    "type": "http",
-    "meta_as_tags" : true,
+    "meta_as_tags" : [
+      "meta-key"
+    ],
    "url" : "https://my-monitoring.example.com:1234/api/write",
    "jwt" : "blabla.blabla.blabla",
+    "username": "myUser",
+    "password": "myPW",
    "timeout": "5s",
-    "max_idle_connections" : 10,
    "idle_connection_timeout" : "5s",
    "flush_delay": "2s",
+    "batch_size": 1000,
+    "precision": "s"
  }
 }
 ```

 - `type`: makes the sink an `http` sink
- `meta_as_tags`: print all meta information as tags in the output (optional)
+- `meta_as_tags`: Move specific meta information to the tags in the output (optional)
 - `url`: The full URL of the endpoint
- `jwt`: JSON web tokens for authentification (Using the *Bearer* scheme)
+- `jwt`: JSON web tokens for authentication (Using the *Bearer* scheme)
+- `username`: username for basic authentication
+- `password`: password for basic authentication
 - `timeout`: General timeout for the HTTP client (default '5s')
- `max_idle_connections`: Maximally idle connections (default 10)
- `idle_connection_timeout`: Timeout for idle connections (default '5s')
+- `max_retries`: Maximum number of retries to connect to the http server
+- `idle_connection_timeout`: Timeout for idle connections (default '120s'). Should be larger than the measurement interval to keep the connection open
 - `flush_delay`: Batch all writes arriving in during this duration (default '1s', batching can be disabled by setting it to 0)
+- `batch_size`: Maximal batch size. If `batch_size` is reached before the end of `flush_delay`, the metrics are sent without further delay
+- `precision`: Precision of the timestamp. Valid values are 's', 'ms', 'us' and 'ns'. (default is 'ns')
+
+### Using HttpSink for communication with cc-metric-store
+
+The cc-metric-store only accepts metrics with a timestamp precision in seconds, so it is required to set `"precision": "s"`.
--- a/sinks/influxAsyncSink.go
+++ b/sinks/influxAsyncSink.go
@@ -1,6 +1,7 @@
 package sinks

 import (
+	"bytes"
 	"context"
 	"crypto/tls"
 	"encoding/json"
@@ -180,22 +181,24 @@ func NewInfluxAsyncSink(name string, config json.RawMessage) (Sink, error) {
 	// 262144 524288

 	if len(config) > 0 {
-		err := json.Unmarshal(config, &s.config)
-		if err != nil {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
 			return nil, err
 		}
 	}
 	if len(s.config.Port) == 0 {
-		return nil, errors.New("Missing port configuration required by InfluxSink")
+		return nil, errors.New("missing port configuration required by InfluxSink")
 	}
 	if len(s.config.Database) == 0 {
-		return nil, errors.New("Missing database configuration required by InfluxSink")
+		return nil, errors.New("missing database configuration required by InfluxSink")
 	}
 	if len(s.config.Organization) == 0 {
-		return nil, errors.New("Missing organization configuration required by InfluxSink")
+		return nil, errors.New("missing organization configuration required by InfluxSink")
 	}
 	if len(s.config.Password) == 0 {
-		return nil, errors.New("Missing password configuration required by InfluxSink")
+		return nil, errors.New("missing password configuration required by InfluxSink")
 	}
 	// Create lookup map to use meta infos as tags in the output metric
 	s.meta_as_tags = make(map[string]bool)
--- a/sinks/influxAsyncSink.md
+++ b/sinks/influxAsyncSink.md
@@ -9,7 +9,6 @@ The `influxasync` sink uses the official [InfluxDB golang client](https://pkg.go
 {
  "<name>": {
    "type": "influxasync",
-    "meta_as_tags" : true,
    "database" : "mymetrics",
    "host": "dbhost.example.com",
    "port": "4222",
@@ -21,13 +20,13 @@ The `influxasync` sink uses the official [InfluxDB golang client](https://pkg.go
    "retry_interval" : "1s",
    "retry_exponential_base" : 2,
    "max_retries": 20,
-    "max_retry_time" : "168h"
+    "max_retry_time" : "168h",
+    "meta_as_tags" : [],
  }
 }
 ```

 - `type`: makes the sink an `influxdb` sink
- `meta_as_tags`: print all meta information as tags in the output (optional)
 - `database`: All metrics are written to this bucket 
 - `host`: Hostname of the InfluxDB database server
 - `port`: Portnumber (as string) of the InfluxDB database server
@@ -40,5 +39,6 @@ The `influxasync` sink uses the official [InfluxDB golang client](https://pkg.go
 - `retry_exponential_base`: The retry interval is exponentially increased with this base, default 2
 - `max_retries`: Maximal number of retry attempts
 - `max_retry_time`: Maximal time to retry failed writes, default 168h (one week)
+- `meta_as_tags`: move meta information keys to tags (optional)

-For information about the calculation of the retry interval settings, see [offical influxdb-client-go documentation](https://github.com/influxdata/influxdb-client-go#handling-of-failed-async-writes)
+For information about the calculation of the retry interval settings, see [offical influxdb-client-go documentation](https://github.com/influxdata/influxdb-client-go#handling-of-failed-async-writes)
--- a/sinks/influxSink.go
+++ b/sinks/influxSink.go
@@ -1,6 +1,7 @@
 package sinks

 import (
+	"bytes"
 	"context"
 	"crypto/tls"
 	"encoding/json"
@@ -13,7 +14,8 @@ import (
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
 	influxdb2Api "github.com/influxdata/influxdb-client-go/v2/api"
-	"github.com/influxdata/influxdb-client-go/v2/api/write"
+	influx "github.com/influxdata/line-protocol/v2/lineprotocol"
+	"golang.org/x/exp/slices"
 )

 type InfluxSink struct {
@@ -32,20 +34,49 @@ type InfluxSink struct {
 		// Maximum number of points sent to server in single request.
 		// Default: 1000
 		BatchSize int `json:"batch_size,omitempty"`
+
 		// Time interval for delayed sending of metrics.
 		// If the buffers are already filled before the end of this interval,
 		// the metrics are sent without further delay.
 		// Default: 1s
 		FlushInterval string `json:"flush_delay,omitempty"`
-		// Number of metrics that are dropped when buffer is full
-		// Default: 100
-		DropRate int `json:"drop_rate,omitempty"`
+		flushDelay    time.Duration
+
+		// Influx client options:
+
+		// HTTP request timeout
+		HTTPRequestTimeout string `json:"http_request_timeout"`
+		// Retry interval
+		InfluxRetryInterval string `json:"retry_interval,omitempty"`
+		// maximum delay between each retry attempt
+		InfluxMaxRetryInterval string `json:"max_retry_interval,omitempty"`
+		// base for the exponential retry delay
+		InfluxExponentialBase uint `json:"retry_exponential_base,omitempty"`
+		// maximum count of retry attempts of failed writes
+		InfluxMaxRetries uint `json:"max_retries,omitempty"`
+		// maximum total retry timeout
+		InfluxMaxRetryTime string `json:"max_retry_time,omitempty"`
+		// Specify whether to use GZip compression in write requests
+		InfluxUseGzip bool `json:"use_gzip"`
 	}
-	batch           []*write.Point
-	flushTimer      *time.Timer
-	flushDelay      time.Duration
-	batchMutex      sync.Mutex // Flush() runs in another goroutine, so this lock has to protect the buffer
-	flushTimerMutex sync.Mutex // Ensure only one flush timer is running
+
+	// influx line protocol encoder
+	encoder influx.Encoder
+	// number of records stored in the encoder
+	numRecordsInEncoder int
+	// List of tags and meta data tags which should be used as tags
+	extended_tag_list []key_value_pair
+	// Flush() runs in another goroutine and accesses the influx line protocol encoder,
+	// so this encoderLock has to protect the encoder and numRecordsInEncoder
+	encoderLock sync.Mutex
+
+	// timer to run Flush()
+	flushTimer *time.Timer
+	// Lock to assure that only one timer is running at a time
+	timerLock sync.Mutex
+
+	// WaitGroup to ensure only one send operation is running at a time
+	sendWaitGroup sync.WaitGroup
 }

 // connect connects to the InfluxDB server
@@ -70,7 +101,7 @@ func (s *InfluxSink) connect() error {
 	} else {
 		auth = fmt.Sprintf("%s:%s", s.config.User, s.config.Password)
 	}
-	cclog.ComponentDebug(s.name,
+	cclog.ComponentDebug(s.name, "connect():",
 		"Using URI='"+uri+"'",
 		"Org='"+s.config.Organization+"'",
 		"Bucket='"+s.config.Database+"'")
@@ -78,6 +109,95 @@ func (s *InfluxSink) connect() error {
 	// Set influxDB client options
 	clientOptions := influxdb2.DefaultOptions()

+	// set HTTP request timeout
+	if len(s.config.HTTPRequestTimeout) > 0 {
+		if t, err := time.ParseDuration(s.config.HTTPRequestTimeout); err == nil {
+			httpRequestTimeout := uint(t.Seconds())
+			clientOptions.SetHTTPRequestTimeout(httpRequestTimeout)
+		} else {
+			cclog.ComponentError(s.name, "connect():", "Failed to parse duration for HTTP RequestTimeout: ", s.config.HTTPRequestTimeout)
+		}
+	}
+	cclog.ComponentDebug(
+		s.name,
+		"connect():",
+		"Influx client options HTTPRequestTimeout:",
+		time.Second*time.Duration(clientOptions.HTTPRequestTimeout()))
+
+	// Set retry interval
+	if len(s.config.InfluxRetryInterval) > 0 {
+		if t, err := time.ParseDuration(s.config.InfluxRetryInterval); err == nil {
+			influxRetryInterval := uint(t.Milliseconds())
+			clientOptions.SetRetryInterval(influxRetryInterval)
+		} else {
+			cclog.ComponentError(s.name, "connect():", "Failed to parse duration for Influx RetryInterval: ", s.config.InfluxRetryInterval)
+		}
+	}
+	cclog.ComponentDebug(
+		s.name,
+		"connect():",
+		"Influx client options RetryInterval:",
+		time.Millisecond*time.Duration(clientOptions.RetryInterval()))
+
+	// Set the maximum delay between each retry attempt
+	if len(s.config.InfluxMaxRetryInterval) > 0 {
+		if t, err := time.ParseDuration(s.config.InfluxMaxRetryInterval); err == nil {
+			influxMaxRetryInterval := uint(t.Milliseconds())
+			clientOptions.SetMaxRetryInterval(influxMaxRetryInterval)
+		} else {
+			cclog.ComponentError(s.name, "connect():", "Failed to parse duration for Influx MaxRetryInterval: ", s.config.InfluxMaxRetryInterval)
+		}
+	}
+	cclog.ComponentDebug(
+		s.name,
+		"connect():",
+		"Influx client options MaxRetryInterval:",
+		time.Millisecond*time.Duration(clientOptions.MaxRetryInterval()))
+
+	// Set the base for the exponential retry delay
+	if s.config.InfluxExponentialBase != 0 {
+		clientOptions.SetExponentialBase(s.config.InfluxExponentialBase)
+	}
+	cclog.ComponentDebug(
+		s.name,
+		"connect():",
+		"Influx client options ExponentialBase:",
+		clientOptions.ExponentialBase())
+
+	// Set maximum count of retry attempts of failed writes
+	if s.config.InfluxMaxRetries != 0 {
+		clientOptions.SetMaxRetries(s.config.InfluxMaxRetries)
+	}
+	cclog.ComponentDebug(
+		s.name,
+		"connect():",
+		"Influx client options MaxRetries:",
+		clientOptions.MaxRetries())
+
+	// Set the maximum total retry timeout
+	if len(s.config.InfluxMaxRetryTime) > 0 {
+		if t, err := time.ParseDuration(s.config.InfluxMaxRetryTime); err == nil {
+			influxMaxRetryTime := uint(t.Milliseconds())
+			cclog.ComponentDebug(s.name, "connect():", "MaxRetryTime", s.config.InfluxMaxRetryTime)
+			clientOptions.SetMaxRetryTime(influxMaxRetryTime)
+		} else {
+			cclog.ComponentError(s.name, "connect():", "Failed to parse duration for Influx MaxRetryInterval: ", s.config.InfluxMaxRetryInterval)
+		}
+	}
+	cclog.ComponentDebug(
+		s.name,
+		"connect():",
+		"Influx client options MaxRetryTime:",
+		time.Millisecond*time.Duration(clientOptions.MaxRetryTime()))
+
+	// Specify whether to use GZip compression in write requests
+	clientOptions.SetUseGZip(s.config.InfluxUseGzip)
+	cclog.ComponentDebug(
+		s.name,
+		"connect():",
+		"Influx client options UseGZip:",
+		clientOptions.UseGZip())
+
 	// Do not check InfluxDB certificate
 	clientOptions.SetTLSConfig(
 		&tls.Config{
@@ -85,7 +205,8 @@ func (s *InfluxSink) connect() error {
 		},
 	)

-	clientOptions.SetPrecision(time.Second)
+	// Set time precision
+	clientOptions.SetPrecision(time.Nanosecond)

 	// Create new writeAPI
 	s.client = influxdb2.NewClientWithOptions(uri, auth, clientOptions)
@@ -102,95 +223,189 @@ func (s *InfluxSink) connect() error {
 	return nil
 }

+// Write sends metric m in influxDB line protocol
 func (s *InfluxSink) Write(m lp.CCMetric) error {

-	if s.flushDelay != 0 && s.flushTimerMutex.TryLock() {
-		// Run a batched flush for all metrics that arrived in the last flush delay interval
-		cclog.ComponentDebug(s.name, "Starting new flush timer")
-		s.flushTimer = time.AfterFunc(
-			s.flushDelay,
-			func() {
-				defer s.flushTimerMutex.Unlock()
-				cclog.ComponentDebug(s.name, "Starting flush in flush timer")
-				if err := s.Flush(); err != nil {
-					cclog.ComponentError(s.name, "Flush timer: flush failed:", err)
-				}
-			})
+	// Lock for encoder usage
+	s.encoderLock.Lock()
+
+	// Encode measurement name
+	s.encoder.StartLine(m.Name())
+
+	// copy tags and meta data which should be used as tags
+	s.extended_tag_list = s.extended_tag_list[:0]
+	for key, value := range m.Tags() {
+		s.extended_tag_list =
+			append(
+				s.extended_tag_list,
+				key_value_pair{
+					key:   key,
+					value: value,
+				},
+			)
+	}
+	for _, key := range s.config.MetaAsTags {
+		if value, ok := m.GetMeta(key); ok {
+			s.extended_tag_list =
+				append(
+					s.extended_tag_list,
+					key_value_pair{
+						key:   key,
+						value: value,
+					},
+				)
+		}
 	}

-	// Lock access to batch slice
-	s.batchMutex.Lock()
-
-	// batch slice full, dropping oldest metric(s)
-	// e.g. when previous flushes failed and batch slice was not cleared
-	if len(s.batch) == s.config.BatchSize {
-		newSize := s.config.BatchSize - s.config.DropRate
-
-		for i := 0; i < newSize; i++ {
-			s.batch[i] = s.batch[i+s.config.DropRate]
-		}
-		for i := newSize; i < s.config.BatchSize; i++ {
-			s.batch[i] = nil
-		}
-		s.batch = s.batch[:newSize]
-		cclog.ComponentError(s.name, "Batch slice full, dropping", s.config.DropRate, "oldest metric(s)")
+	// Encode tags (they musts be in lexical order)
+	slices.SortFunc(
+		s.extended_tag_list,
+		func(a key_value_pair, b key_value_pair) int {
+			if a.key < b.key {
+				return -1
+			}
+			if a.key > b.key {
+				return +1
+			}
+			return 0
+		},
+	)
+	for i := range s.extended_tag_list {
+		s.encoder.AddTag(
+			s.extended_tag_list[i].key,
+			s.extended_tag_list[i].value,
+		)
 	}

-	// Append metric to batch slice
-	p := m.ToPoint(s.meta_as_tags)
-	s.batch = append(s.batch, p)
+	// Encode fields
+	for key, value := range m.Fields() {
+		s.encoder.AddField(key, influx.MustNewValue(value))
+	}

-	// Flush synchronously if "flush_delay" is zero
-	// or
-	// Flush if batch size is reached
-	if s.flushDelay == 0 ||
-		len(s.batch) == s.config.BatchSize {
-		// Unlock access to batch slice
-		s.batchMutex.Unlock()
+	// Encode time stamp
+	s.encoder.EndLine(m.Time())
+
+	// Check for encoder errors
+	if err := s.encoder.Err(); err != nil {
+		// Unlock encoder usage
+		s.encoderLock.Unlock()
+
+		return fmt.Errorf("Encoding failed: %v", err)
+	}
+	s.numRecordsInEncoder++
+
+	if s.config.flushDelay == 0 {
+		// Unlock encoder usage
+		s.encoderLock.Unlock()
+
+		// Directly flush if no flush delay is configured
 		return s.Flush()
+	} else if s.numRecordsInEncoder == s.config.BatchSize {
+		// Unlock encoder usage
+		s.encoderLock.Unlock()
+
+		// Stop flush timer
+		if s.flushTimer != nil {
+			if ok := s.flushTimer.Stop(); ok {
+				cclog.ComponentDebug(s.name, "Write(): Stopped flush timer. Batch size limit reached before flush delay")
+				s.timerLock.Unlock()
+			}
+		}
+
+		// Flush if batch size is reached
+		return s.Flush()
+	} else if s.timerLock.TryLock() {
+
+		// Setup flush timer when flush delay is configured
+		// and no other timer is already running
+		if s.flushTimer != nil {
+
+			// Restarting existing flush timer
+			cclog.ComponentDebug(s.name, "Write(): Restarting flush timer")
+			s.flushTimer.Reset(s.config.flushDelay)
+		} else {
+
+			// Creating and starting flush timer
+			cclog.ComponentDebug(s.name, "Write(): Starting new flush timer")
+			s.flushTimer = time.AfterFunc(
+				s.config.flushDelay,
+				func() {
+					defer s.timerLock.Unlock()
+					cclog.ComponentDebug(s.name, "Starting flush triggered by flush timer")
+					if err := s.Flush(); err != nil {
+						cclog.ComponentError(s.name, "Flush triggered by flush timer: flush failed:", err)
+					}
+				})
+		}
 	}

-	// Unlock access to batch slice
-	s.batchMutex.Unlock()
+	// Unlock encoder usage
+	s.encoderLock.Unlock()
 	return nil
 }

-// Flush sends all metrics buffered in batch slice to InfluxDB server
+// Flush sends all metrics stored in encoder to InfluxDB server
 func (s *InfluxSink) Flush() error {
-	cclog.ComponentDebug(s.name, "Flushing")

-	// Lock access to batch slice
-	s.batchMutex.Lock()
-	defer s.batchMutex.Unlock()
+	// Lock for encoder usage
+	// Own lock for as short as possible: the time it takes to clone the buffer.
+	s.encoderLock.Lock()

-	// Nothing to do, batch slice is empty
-	if len(s.batch) == 0 {
+	buf := slices.Clone(s.encoder.Bytes())
+	numRecordsInBuf := s.numRecordsInEncoder
+	s.encoder.Reset()
+	s.numRecordsInEncoder = 0
+
+	// Unlock encoder usage
+	s.encoderLock.Unlock()
+
+	if len(buf) == 0 {
 		return nil
 	}

-	// Send metrics from batch slice
-	err := s.writeApi.WritePoint(context.Background(), s.batch...)
-	if err != nil {
-		cclog.ComponentError(s.name, "Flush(): Flush of", len(s.batch), "metrics failed:", err)
-		return err
-	}
+	cclog.ComponentDebug(s.name, "Flush(): Flushing", numRecordsInBuf, "metrics")

-	// Clear batch slice
-	for i := range s.batch {
-		s.batch[i] = nil
-	}
-	s.batch = s.batch[:0]
+	// Asynchron send of encoder metrics
+	s.sendWaitGroup.Add(1)
+	go func() {
+		defer s.sendWaitGroup.Done()
+		startTime := time.Now()
+		err := s.writeApi.WriteRecord(context.Background(), string(buf))
+		if err != nil {
+			cclog.ComponentError(
+				s.name,
+				"Flush():",
+				"Flush failed:", err,
+				"(number of records =", numRecordsInBuf,
+				", buffer size =", len(buf),
+				", send duration =", time.Since(startTime),
+				")",
+			)
+			return
+		}
+	}()

 	return nil
 }

 func (s *InfluxSink) Close() {
 	cclog.ComponentDebug(s.name, "Closing InfluxDB connection")
-	s.flushTimer.Stop()
-	s.Flush()
-	if err := s.Flush(); err != nil {
-		cclog.ComponentError(s.name, "Close(): Flush failed:", err)
+
+	// Stop existing timer and immediately flush
+	if s.flushTimer != nil {
+		if ok := s.flushTimer.Stop(); ok {
+			s.timerLock.Unlock()
+		}
 	}
+
+	// Flush
+	if err := s.Flush(); err != nil {
+		cclog.ComponentError(s.name, "Close():", "Flush failed:", err)
+	}
+
+	// Wait for send operations to finish
+	s.sendWaitGroup.Wait()
+
 	s.client.Close()
 }

@@ -202,30 +417,31 @@ func NewInfluxSink(name string, config json.RawMessage) (Sink, error) {
 	// Set config default values
 	s.config.BatchSize = 1000
 	s.config.FlushInterval = "1s"
-	s.config.DropRate = 100

 	// Read config
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &s.config)
-		if err != nil {
-			return s, err
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
+			return nil, err
 		}
 	}

 	if len(s.config.Host) == 0 {
-		return s, errors.New("Missing host configuration required by InfluxSink")
+		return s, errors.New("missing host configuration required by InfluxSink")
 	}
 	if len(s.config.Port) == 0 {
-		return s, errors.New("Missing port configuration required by InfluxSink")
+		return s, errors.New("missing port configuration required by InfluxSink")
 	}
 	if len(s.config.Database) == 0 {
-		return s, errors.New("Missing database configuration required by InfluxSink")
+		return s, errors.New("missing database configuration required by InfluxSink")
 	}
 	if len(s.config.Organization) == 0 {
-		return s, errors.New("Missing organization configuration required by InfluxSink")
+		return s, errors.New("missing organization configuration required by InfluxSink")
 	}
 	if len(s.config.Password) == 0 {
-		return s, errors.New("Missing password configuration required by InfluxSink")
+		return s, errors.New("missing password configuration required by InfluxSink")
 	}

 	// Create lookup map to use meta infos as tags in the output metric
@@ -238,28 +454,22 @@ func NewInfluxSink(name string, config json.RawMessage) (Sink, error) {
 	if len(s.config.FlushInterval) > 0 {
 		t, err := time.ParseDuration(s.config.FlushInterval)
 		if err == nil {
-			s.flushDelay = t
+			s.config.flushDelay = t
 		}
 	}

 	if !(s.config.BatchSize > 0) {
 		return s, fmt.Errorf("batch_size=%d in InfluxDB config must be > 0", s.config.BatchSize)
 	}
-	if !(s.config.DropRate > 0) {
-		return s, fmt.Errorf("drop_rate=%d in InfluxDB config must be > 0", s.config.DropRate)
-	}
-	if !(s.config.BatchSize > s.config.DropRate) {
-		return s, fmt.Errorf(
-			"batch_size=%d must be greater then drop_rate=%d in InfluxDB config",
-			s.config.BatchSize, s.config.DropRate)
-	}
-
-	// allocate batch slice
-	s.batch = make([]*write.Point, 0, s.config.BatchSize)

 	// Connect to InfluxDB server
 	if err := s.connect(); err != nil {
 		return s, fmt.Errorf("unable to connect: %v", err)
 	}
+
+	// Configure influx line protocol encoder
+	s.encoder.SetPrecision(influx.Nanosecond)
+	s.extended_tag_list = make([]key_value_pair, 0)
+
 	return s, nil
 }
--- a/sinks/influxSink.md
+++ b/sinks/influxSink.md
@@ -2,14 +2,12 @@

 The `influxdb` sink uses the official [InfluxDB golang client](https://pkg.go.dev/github.com/influxdata/influxdb-client-go/v2) to write the metrics to an InfluxDB database in a **blocking** fashion. It provides only support for V2 write endpoints (InfluxDB 1.8.0 or later).

-
 ### Configuration structure

 ```json
 {
  "<name>": {
    "type": "influxdb",
-    "meta_as_tags" : true,
    "database" : "mymetrics",
    "host": "dbhost.example.com",
    "port": "4222",
@@ -18,20 +16,33 @@ The `influxdb` sink uses the official [InfluxDB golang client](https://pkg.go.de
    "organization": "myorg",
    "ssl": true,
    "flush_delay" : "1s",
-    "batch_size" : 100
+    "batch_size" : 1000,
+    "use_gzip": true
+    "meta_as_tags" : [],
  }
 }
 ```

 - `type`: makes the sink an `influxdb` sink
 - `meta_as_tags`: print all meta information as tags in the output (optional)
- `database`: All metrics are written to this bucket 
+- `database`: All metrics are written to this bucket
 - `host`: Hostname of the InfluxDB database server
- `port`: Portnumber (as string) of the InfluxDB database server
- `user`: Username for basic authentification
- `password`: Password for basic authentification
+- `port`: Port number (as string) of the InfluxDB database server
+- `user`: Username for basic authentication
+- `password`: Password for basic authentication
 - `organization`: Organization in the InfluxDB
 - `ssl`: Use SSL connection
 - `flush_delay`: Group metrics coming in to a single batch
- `batch_size`: Maximal batch size
+- `batch_size`: Maximal batch size. If `batch_size` is reached before the end of `flush_delay`, the metrics are sent without further delay

+Influx client options:
+=======
+- `batch_size`: Maximal batch size
+- `meta_as_tags`: move meta information keys to tags (optional)
+- `http_request_timeout`: HTTP request timeout
+- `retry_interval`: retry interval
+- `max_retry_interval`: maximum delay between each retry attempt
+- `retry_exponential_base`: base for the exponential retry delay
+- `max_retries`: maximum count of retry attempts of failed writes
+- `max_retry_time`: maximum total retry timeout
+- `use_gzip`: Specify whether to use GZip compression in write requests
--- a/sinks/libgangliaSink.go
+++ b/sinks/libgangliaSink.go
@@ -66,6 +66,7 @@ void Ganglia_pool_destroy( Ganglia_pool pool );
 import "C"

 import (
+	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -233,8 +234,9 @@ func NewLibgangliaSink(name string, config json.RawMessage) (Sink, error) {
 	s.config.GmondConfig = string(GMOND_CONFIG_FILE)
 	s.config.GangliaLib = string(GANGLIA_LIB_NAME)
 	if len(config) > 0 {
-		err = json.Unmarshal(config, &s.config)
-		if err != nil {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
 			cclog.ComponentError(s.name, "Error reading config:", err.Error())
 			return nil, err
 		}
--- a/sinks/mqttSink.go
+++ b/sinks/mqttSink.go
@@ -0,0 +1,372 @@
+package sinks
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net"
+	"os"
+	"sync"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
+	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
+	"github.com/go-mqtt/mqtt"
+	influx "github.com/influxdata/line-protocol/v2/lineprotocol"
+	"golang.org/x/exp/slices"
+)
+
+type MqttSinkConfig struct {
+	// defines JSON tags for 'type' and 'meta_as_tags' (string list)
+	// See: metricSink.go
+	defaultSinkConfig
+	// Additional config options, for MqttSink
+	ClientID             string `json:"client_id"`
+	PersistenceDirectory string `json:"persistence_directory,omitempty"`
+	// Maximum number of points sent to server in single request.
+	// Default: 1000
+	BatchSize int `json:"batch_size,omitempty"`
+
+	// Time interval for delayed sending of metrics.
+	// If the buffers are already filled before the end of this interval,
+	// the metrics are sent without further delay.
+	// Default: 1s
+	FlushInterval string `json:"flush_delay,omitempty"`
+	flushDelay    time.Duration
+
+	DialProtocol string `json:"dial_protocol"`
+	Hostname     string `json:"hostname"`
+	Port         int    `json:"port"`
+	PauseTimeout string `json:"pause_timeout"`
+	pauseTimeout time.Duration
+	KeepAlive    uint16 `json:"keep_alive_seconds"`
+	Username     string `json:"username,omitempty"`
+	Password     string `json:"password,omitempty"`
+}
+
+type MqttSink struct {
+	// declares elements 	'name' and 'meta_as_tags' (string to bool map!)
+	sink
+	config MqttSinkConfig // entry point to the MqttSinkConfig
+	// influx line protocol encoder
+	encoder influx.Encoder
+	// number of records stored in the encoder
+	numRecordsInEncoder int
+	// List of tags and meta data tags which should be used as tags
+	extended_tag_list []key_value_pair
+	// Flush() runs in another goroutine and accesses the influx line protocol encoder,
+	// so this encoderLock has to protect the encoder and numRecordsInEncoder
+	encoderLock sync.Mutex
+
+	// timer to run Flush()
+	flushTimer *time.Timer
+	// Lock to assure that only one timer is running at a time
+	timerLock sync.Mutex
+
+	// WaitGroup to ensure only one send operation is running at a time
+	sendWaitGroup sync.WaitGroup
+
+	client     *mqtt.Client
+	mqttconfig mqtt.Config
+}
+
+// Implement functions required for Sink interface
+// Write(...), Flush(), Close()
+// See: metricSink.go
+
+// Code to submit a single CCMetric to the sink
+func (s *MqttSink) Write(m lp.CCMetric) error {
+
+	// Lock for encoder usage
+	s.encoderLock.Lock()
+
+	// Encode measurement name
+	s.encoder.StartLine(m.Name())
+
+	// copy tags and meta data which should be used as tags
+	s.extended_tag_list = s.extended_tag_list[:0]
+	for key, value := range m.Tags() {
+		s.extended_tag_list =
+			append(
+				s.extended_tag_list,
+				key_value_pair{
+					key:   key,
+					value: value,
+				},
+			)
+	}
+	for _, key := range s.config.MetaAsTags {
+		if value, ok := m.GetMeta(key); ok {
+			s.extended_tag_list =
+				append(
+					s.extended_tag_list,
+					key_value_pair{
+						key:   key,
+						value: value,
+					},
+				)
+		}
+	}
+
+	// Encode tags (they musts be in lexical order)
+	slices.SortFunc(
+		s.extended_tag_list,
+		func(a key_value_pair, b key_value_pair) int {
+			if a.key < b.key {
+				return -1
+			}
+			if a.key > b.key {
+				return +1
+			}
+			return 0
+		},
+	)
+	for i := range s.extended_tag_list {
+		s.encoder.AddTag(
+			s.extended_tag_list[i].key,
+			s.extended_tag_list[i].value,
+		)
+	}
+
+	// Encode fields
+	for key, value := range m.Fields() {
+		s.encoder.AddField(key, influx.MustNewValue(value))
+	}
+
+	// Encode time stamp
+	s.encoder.EndLine(m.Time())
+
+	// Check for encoder errors
+	if err := s.encoder.Err(); err != nil {
+		// Unlock encoder usage
+		s.encoderLock.Unlock()
+
+		return fmt.Errorf("encoding failed: %v", err)
+	}
+	s.numRecordsInEncoder++
+
+	if s.config.flushDelay == 0 {
+		// Unlock encoder usage
+		s.encoderLock.Unlock()
+
+		// Directly flush if no flush delay is configured
+		return s.Flush()
+	} else if s.numRecordsInEncoder == s.config.BatchSize {
+		// Unlock encoder usage
+		s.encoderLock.Unlock()
+
+		// Stop flush timer
+		if s.flushTimer != nil {
+			if ok := s.flushTimer.Stop(); ok {
+				cclog.ComponentDebug(s.name, "Write(): Stopped flush timer. Batch size limit reached before flush delay")
+				s.timerLock.Unlock()
+			}
+		}
+
+		// Flush if batch size is reached
+		return s.Flush()
+	} else if s.timerLock.TryLock() {
+
+		// Setup flush timer when flush delay is configured
+		// and no other timer is already running
+		if s.flushTimer != nil {
+
+			// Restarting existing flush timer
+			cclog.ComponentDebug(s.name, "Write(): Restarting flush timer")
+			s.flushTimer.Reset(s.config.flushDelay)
+		} else {
+
+			// Creating and starting flush timer
+			cclog.ComponentDebug(s.name, "Write(): Starting new flush timer")
+			s.flushTimer = time.AfterFunc(
+				s.config.flushDelay,
+				func() {
+					defer s.timerLock.Unlock()
+					cclog.ComponentDebug(s.name, "Starting flush triggered by flush timer")
+					if err := s.Flush(); err != nil {
+						cclog.ComponentError(s.name, "Flush triggered by flush timer: flush failed:", err)
+					}
+				})
+		}
+	}
+
+	// Unlock encoder usage
+	s.encoderLock.Unlock()
+	return nil
+}
+
+// If the sink uses batched sends internally, you can tell to flush its buffers
+func (s *MqttSink) Flush() error {
+
+	// Lock for encoder usage
+	// Own lock for as short as possible: the time it takes to clone the buffer.
+	s.encoderLock.Lock()
+
+	buf := slices.Clone(s.encoder.Bytes())
+	numRecordsInBuf := s.numRecordsInEncoder
+	s.encoder.Reset()
+	s.numRecordsInEncoder = 0
+
+	// Unlock encoder usage
+	s.encoderLock.Unlock()
+
+	if len(buf) == 0 {
+		return nil
+	}
+
+	cclog.ComponentDebug(s.name, "Flush(): Flushing", numRecordsInBuf, "metrics")
+
+	// Asynchron send of encoder metrics
+	s.sendWaitGroup.Add(1)
+	go func() {
+		defer s.sendWaitGroup.Done()
+		//startTime := time.Now()
+		for {
+			exchange, err := s.client.PublishAtLeastOnce(buf, s.config.ClientID)
+			switch {
+			case err == nil:
+				return
+
+			case mqtt.IsDeny(err), errors.Is(err, mqtt.ErrClosed):
+				return
+
+			case errors.Is(err, mqtt.ErrMax):
+				time.Sleep(s.config.pauseTimeout)
+
+			default:
+				time.Sleep(s.config.pauseTimeout)
+				continue
+			}
+
+			for err := range exchange {
+				if errors.Is(err, mqtt.ErrClosed) {
+					return
+				}
+
+			}
+			return
+		}
+	}()
+	return nil
+}
+
+// Close sink: close network connection, close files, close libraries, ...
+func (s *MqttSink) Close() {
+
+	cclog.ComponentDebug(s.name, "CLOSE")
+
+	// Stop existing timer and immediately flush
+	if s.flushTimer != nil {
+		if ok := s.flushTimer.Stop(); ok {
+			s.timerLock.Unlock()
+		}
+	}
+
+	// Flush
+	if err := s.Flush(); err != nil {
+		cclog.ComponentError(s.name, "Close():", "Flush failed:", err)
+	}
+
+	// Wait for send operations to finish
+	s.sendWaitGroup.Wait()
+
+	s.client.Close()
+	s.client = nil
+}
+
+// New function to create a new instance of the sink
+// Initialize the sink by giving it a name and reading in the config JSON
+func NewMqttSink(name string, config json.RawMessage) (Sink, error) {
+	s := new(MqttSink)
+
+	// Set name of sampleSink
+	// The name should be chosen in such a way that different instances of MqttSink can be distinguished
+	s.name = fmt.Sprintf("MqttSink(%s)", name) // Always specify a name here
+
+	// Set defaults in s.config
+	// Allow overwriting these defaults by reading config JSON
+
+	s.config.PauseTimeout = "4s"
+	s.config.pauseTimeout = time.Duration(4) * time.Second
+	s.config.DialProtocol = "tcp"
+	s.config.Hostname = "localhost"
+	s.config.Port = 1883
+
+	// Read in the config JSON
+	if len(config) > 0 {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
+			return nil, err
+		}
+	}
+
+	// Create lookup map to use meta infos as tags in the output metric
+	s.meta_as_tags = make(map[string]bool)
+	for _, k := range s.config.MetaAsTags {
+		s.meta_as_tags[k] = true
+	}
+
+	// Check if all required fields in the config are set
+	// E.g. use 'len(s.config.Option) > 0' for string settings
+	if t, err := time.ParseDuration(s.config.PauseTimeout); err == nil {
+		s.config.pauseTimeout = t
+	} else {
+		err := fmt.Errorf("to parse duration for PauseTimeout: %s", s.config.PauseTimeout)
+		cclog.ComponentError(s.name, err.Error())
+		return nil, err
+	}
+	if t, err := time.ParseDuration(s.config.FlushInterval); err == nil {
+		s.config.flushDelay = t
+	} else {
+		err := fmt.Errorf("to parse duration for FlushInterval: %s", s.config.FlushInterval)
+		cclog.ComponentError(s.name, err.Error())
+		return nil, err
+	}
+
+	switch s.config.DialProtocol {
+	case "tcp", "udp":
+	default:
+		err := errors.New("failed to parse dial protocol, allowed: tcp, udp")
+		cclog.ComponentError(s.name, err.Error())
+		return nil, err
+	}
+
+	var persistence mqtt.Persistence
+	if len(s.config.PersistenceDirectory) > 0 {
+		persistence = mqtt.FileSystem(s.config.PersistenceDirectory)
+	} else {
+		tmpdir, err := os.MkdirTemp("", "mqtt")
+		if err == nil {
+			persistence = mqtt.FileSystem(tmpdir)
+		}
+	}
+
+	// Establish connection to the server, library, ...
+	// Check required files exist and lookup path(s) of executable(s)
+
+	dialer := mqtt.NewDialer(s.config.DialProtocol, net.JoinHostPort(s.config.Hostname, fmt.Sprintf("%d", s.config.Port)))
+
+	s.mqttconfig = mqtt.Config{
+		Dialer:       dialer,
+		PauseTimeout: s.config.pauseTimeout,
+		KeepAlive:    uint16(s.config.KeepAlive),
+	}
+	if len(s.config.Username) > 0 {
+		s.mqttconfig.UserName = s.config.Username
+	}
+	if len(s.config.Password) > 0 {
+		s.mqttconfig.Password = []byte(s.config.Password)
+	}
+
+	client, err := mqtt.InitSession(s.config.ClientID, persistence, &s.mqttconfig)
+	if err != nil {
+		return nil, err
+	}
+	s.client = client
+
+	// Return (nil, meaningful error message) in case of errors
+	return s, nil
+}
--- a/sinks/mqttSink.md
+++ b/sinks/mqttSink.md
@@ -0,0 +1,39 @@
+## `mqtt` sink
+
+The `mqtt` sink publishes all metrics into a MQTT network.
+
+### Configuration structure
+
+```json
+{
+  "<name>": {
+    "type": "mqtt",
+    "client_id" : "myid",
+    "persistence_directory": "/tmp",
+    "batch_size": 1000,
+    "flush_delay": "1s",
+    "dial_protocol": "tcp",
+    "host": "dbhost.example.com",
+    "port": 1883,
+    "user": "exampleuser",
+    "password" : "examplepw",
+    "pause_timeout": "1s",
+    "keep_alive_seconds": 10,
+    "meta_as_tags" : [],
+  }
+}
+```
+
+- `type`: makes the sink an `mqtt` sink
+- `client_id`: MQTT clients use a client_id to talk to the broker
+- `persistence_directory`: MQTT stores messages temporarly on disc if the broker is not available. Folder needs to be writable (default: `/tmp`)
+- `pause_timeout`: Waittime when published failed
+- `keep_alive_seconds`: Keep the connection alive for some time. Recommended to be longer than global `interval`.
+- `flush_delay`: Group metrics coming in to a single batch
+- `batch_size`: Maximal batch size. If `batch_size` is reached before the end of `flush_delay`, the metrics are sent without further delay
+- `dial_protocol`: Use `tcp` or `udp` for the MQTT communication
+- `host`: Hostname of the MQTT broker
+- `port`: Port number of the MQTT broker
+- `user`: Username for authentication
+- `password`: Password for authentication
+- `meta_as_tags`: print all meta information as tags in the output (optional)
--- a/sinks/natsSink.go
+++ b/sinks/natsSink.go
@@ -108,9 +108,10 @@ func NewNatsSink(name string, config json.RawMessage) (Sink, error) {
 	s.name = fmt.Sprintf("NatsSink(%s)", name)
 	s.flushDelay = 10 * time.Second
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &s.config)
-		if err != nil {
-			cclog.ComponentError(s.name, "Error reading config for", s.name, ":", err.Error())
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
 			return nil, err
 		}
 	}
--- a/sinks/natsSink.md
+++ b/sinks/natsSink.md
@@ -2,27 +2,26 @@

 The `nats` sink publishes all metrics into a NATS network. The publishing key is the database name provided in the configuration file

-
 ### Configuration structure

 ```json
 {
  "<name>": {
    "type": "nats",
-    "meta_as_tags" : true,
    "database" : "mymetrics",
    "host": "dbhost.example.com",
    "port": "4222",
    "user": "exampleuser",
-    "password" : "examplepw"
+    "password" : "examplepw",
+    "meta_as_tags" : [],
  }
 }
 ```

 - `type`: makes the sink an `nats` sink
- `meta_as_tags`: print all meta information as tags in the output (optional)
 - `database`: All metrics are published with this subject
 - `host`: Hostname of the NATS server
- `port`: Portnumber (as string) of the NATS server
- `user`: Username for basic authentification
- `password`: Password for basic authentification
+- `port`: Port number (as string) of the NATS server
+- `user`: Username for basic authentication
+- `password`: Password for basic authentication
+- `meta_as_tags`: print all meta information as tags in the output (optional)
--- a/sinks/prometheusSink.go
+++ b/sinks/prometheusSink.go
@@ -1,6 +1,7 @@
 package sinks

 import (
+	"bytes"
 	"context"
 	"encoding/json"
 	"errors"
@@ -167,9 +168,10 @@ func NewPrometheusSink(name string, config json.RawMessage) (Sink, error) {
 	s := new(PrometheusSink)
 	s.name = "PrometheusSink"
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &s.config)
-		if err != nil {
-			cclog.ComponentError(s.name, "Error reading config for", s.name, ":", err.Error())
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
 			return nil, err
 		}
 	}
--- a/sinks/sampleSink.go
+++ b/sinks/sampleSink.go
@@ -1,6 +1,7 @@
 package sinks

 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"log"
@@ -57,8 +58,10 @@ func NewSampleSink(name string, config json.RawMessage) (Sink, error) {

 	// Read in the config JSON
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &s.config)
-		if err != nil {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
 			return nil, err
 		}
 	}
--- a/sinks/sinkManager.go
+++ b/sinks/sinkManager.go
@@ -21,6 +21,7 @@ var AvailableSinks = map[string]func(name string, config json.RawMessage) (Sink,
 	"influxdb":    NewInfluxSink,
 	"influxasync": NewInfluxAsyncSink,
 	"http":        NewHttpSink,
+	"mqtt":        NewMqttSink,
 }

 // Metric collector manager data structure
@@ -84,7 +85,7 @@ func (sm *sinkManager) Init(wg *sync.WaitGroup, sinkConfigFile string) error {
 	// Check that at least one sink is running
 	if !(len(sm.sinks) > 0) {
 		cclog.ComponentError("SinkManager", "Found no usable sinks")
-		return fmt.Errorf("Found no usable sinks")
+		return fmt.Errorf("found no usable sinks")
 	}

 	return nil
@@ -157,7 +158,7 @@ func (sm *sinkManager) AddOutput(name string, rawConfig json.RawMessage) error {
 	}
 	s, err := AvailableSinks[sinkConfig.Type](name, rawConfig)
 	if err != nil {
-		cclog.ComponentError("SinkManager", "SKIP", s.Name(), "initialization failed:", err.Error())
+		cclog.ComponentError("SinkManager", "SKIP", name, "initialization failed:", err.Error())
 		return err
 	}
 	sm.sinks[name] = s
--- a/sinks/stdoutSink.go
+++ b/sinks/stdoutSink.go
@@ -1,12 +1,14 @@
 package sinks

 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"os"
 	"strings"

 	//	"time"
+	cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
 	lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
 )

@@ -42,8 +44,10 @@ func NewStdoutSink(name string, config json.RawMessage) (Sink, error) {
 	s := new(StdoutSink)
 	s.name = fmt.Sprintf("StdoutSink(%s)", name)
 	if len(config) > 0 {
-		err := json.Unmarshal(config, &s.config)
-		if err != nil {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&s.config); err != nil {
+			cclog.ComponentError(s.name, "Error reading config:", err.Error())
 			return nil, err
 		}
 	}
--- a/sinks/stdoutSink.md
+++ b/sinks/stdoutSink.md
@@ -9,14 +9,14 @@ The `stdout` sink is the most simple sink provided by cc-metric-collector. It wr
 {
  "<name>": {
    "type": "stdout",
-    "meta_as_tags" : true,
+    "meta_as_tags" : [],
    "output_file" : "mylogfile.log"
  }
 }
 ```

 - `type`: makes the sink an `stdout` sink
- `meta_as_tags`: print all meta information as tags in the output (optional)
+- `meta_as_tags`: print meta information as tags in the output (optional)
 - `output_file`: Write all data to the selected file (optional). There are two 'special' files: `stdout` and `stderr`. If this option is not provided, the default value is `stdout`