Description
Currently Accumulo only drops delete entries when its major compacting all files. All files may never be compacted. Lots of delete entries building up can be problematic for scan performance.
Possible solutions :
- Keep a count of the # of delete entries per file. Compact all when the ratio of delete entries to entries crosses a threshold.
- When a scan encounters a tablet w/ a lot of delete entries, schedule a majc. This is reactive, but removes the need for bookkeeping in the previous solution.
Attachments
Issue Links
- is superceded by
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ACCUMULO-1266 Automatically determine when a full major compaction would benefit scans
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- Resolved
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