cc-metric-store/TODO.md

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# Possible Tasks and Improvements
Importance:
- **I** Important
- **N** Nice to have
- **W** Won't do. Probably not necessary.
- Benchmarking
- Benchmark and compare common timeseries DBs with our data and our queries (N)
- Memory management
- To overcome garbage collection overhead: Reimplement in Rust (N)
- Request memory directly batchwise via mmap (started in branch) (W)
- Archive
- S3 backend for archive (I)
- Store information in each buffer if already archived (N)
- Do not create new checkpoint if all buffers already archived (N)
- Checkpoints
- S3 backend for checkpoints (I)
- Combine checkpoints into larger files (I)
- Binary checkpoints (started in branch) (W)
- API
- Redesign query interface (N)
- Introduce JWT authentication for REST and NATS (I)
- Testing
- General tests (I)
- Test data generator for regression tests (I)
- Check for corner cases that should fail gracefully (N)
- Write a more realistic `ToArchive`/`FromArchive` Tests (N)
- Aggregation
- Calculate averages buffer-wise as soon as full, average weighted by length of buffer (N)
- Only the head-buffer needs to be fully traversed (N)
- If aggregating over hwthreads/cores/sockets cache those results and reuse
some of that for new queries aggregating only over the newer data (W)
- Compression
- Enable compression for http API requests (N)
- Enable compression for checkpoints/archive (I)
- Sampling
- Support data re sampling to reduce data points (I)
- Use re sampling algorithms that preserve min/max as far as possible (I)