diff --git a/Makefile b/Makefile
index 3a03b45..1210850 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ TARGET = ./cc-backend
 VAR = ./var
 CFG = config.json .env
 FRONTEND = ./web/frontend
-VERSION = 1
+VERSION = 1.0.0
 GIT_HASH := $(shell git rev-parse --short HEAD || echo 'development')
 CURRENT_TIME = $(shell date +"%Y-%m-%d:T%H:%M:%S")
 LD_FLAGS = '-s -X main.buildTime=${CURRENT_TIME} -X main.version=${VERSION} -X main.hash=${GIT_HASH}'
diff --git a/ReleaseNotes.md b/ReleaseNotes.md
new file mode 100644
index 0000000..97dd8de
--- /dev/null
+++ b/ReleaseNotes.md
@@ -0,0 +1,27 @@
+# `cc-backend` version 1.0.0
+
+Supports job archive version 1 and database version 4.
+
+This is the initial release of `cc-backend`, the API backend and frontend
+implementation of ClusterCockpit.
+
+**Breaking changes**
+
+The aggregate job statistic core hours is now computed using the job table
+column `num_hwthreads`. In a the future release this column will be renamed to
+`num_cores`. For correct display of core hours `num_hwthreads` must be correctly
+filled on job start. If your existing jobs do not provide the correct value in
+this column then you can set this with one SQL INSERT statement. This only applies
+if you have exclusive jobs, only. Please be aware that we treat this column as
+it is the number of cores. In case you have SMT enabled and `num_hwthreads`
+is not the number of cores the core hours will be too high by a factor!
+
+**Features**
+* Supports user roles admin, support, manager, user, and api.
+* Unified search bar supports job id, job name, project id, user name, and name
+* Performance improvements for sqlite db backend
+* Extended REST api supports to query job metrics
+* Better support for shared jobs
+* More flexible metric list configuration
+* Versioning and migration for database and job archive
+
diff --git a/internal/api/rest.go b/internal/api/rest.go
index 55ca14c..b66a561 100644
--- a/internal/api/rest.go
+++ b/internal/api/rest.go
@@ -32,7 +32,7 @@ import (
 )
 
 // @title                      ClusterCockpit REST API
-// @version                    1
+// @version                    1.0.0
 // @description                API for batch job control.
 
 // @tag.name Job API
diff --git a/pkg/schema/metrics.go b/pkg/schema/metrics.go
index 92ac206..d9a13d3 100644
--- a/pkg/schema/metrics.go
+++ b/pkg/schema/metrics.go
@@ -58,11 +58,15 @@ const (
 var metricScopeGranularity map[MetricScope]int = map[MetricScope]int{
 	MetricScopeNode:         10,
 	MetricScopeSocket:       5,
-	MetricScopeMemoryDomain: 3,
-	MetricScopeCore:         2,
-	MetricScopeHWThread:     1,
-
-	MetricScopeAccelerator: 5, // Special/Randomly choosen
+	MetricScopeMemoryDomain: 4,
+	MetricScopeCore:         3,
+	MetricScopeHWThread:     2,
+	/* Special-Case Accelerator
+	 * -> No conversion possible if native scope is HWTHREAD
+	 * -> Therefore needs to be less than HWTREAD, else max() would return unhandled case
+	 * -> If nativeScope is accelerator, accelerator metrics return correctly
+	 */
+	MetricScopeAccelerator: 1,
 
 	MetricScopeInvalid: -1,
 }