Suggestion: Add Threaded read-ahead decompression #34
Description
Threaded read-ahead decompression
- Threaded, so latency isn't added to the current requested read block.
- The Read-ahead thread should wait until the requested block is returned to avoid competing for IO simultaneously versus the current request.
- If a requested location already exists in the decoded read-ahead blocks, then it's returned immediately and any new delta read-ahead block are decoded to the cache.
- Read-ahead distance in KiB is configurable via API (which gets converted to N compressed blocks internally).
- If -1 is passed in for the read-ahead distance, then the read-ahead thread will keep going until it decodes the last block (only pausing to yield to current requests to avoid contention), likewise the read-ahead memory cache will expand to hold all decoded blocks.