TODO

Delete this file and create more GitHub issues instead?
Missing Testcases:
- Port at least all blackbox tests from the "old" MemoryStore to the new implementation
- Check for corner cases that should fail gracefully
- Write a more realistic ToArchive/FromArchive tests
- Test edgecases for horizontal aggregations
Release Data
- Implement API endpoint for releasing old data
- Make sure data is written to disk before it is released
- Automatically free up old buffers periodically?
Implement basic support for aggregations over time (stats like min/max/avg)
- Optimization: Once a buffer is full, calculate min, max and avg
  - Calculate averages buffer-wise, average weighted by length of buffer
Implement basic support for query of most recent value for every metric on every host
Optimize horizontal aggregations
Optimize locking of levels in the tree structure
- In 99.9% of cases, no new level will need to be created, so all lookups into level.children will be read only
- level.metrics will be modified more often and will accesses will need to be serialized here
- Suggestion: Use a proper Mutex for level.metrics, but something read-optimized and possibly lock-free for level.children
...