mirror of https://github.com/facebook/rocksdb.git
a571cbed17
Summary: When the input files are not overlapping, a.k.a `files_overlap_=false`, it's best to assign them to non L0 levels so that they are not one sorted run each. This can be done regardless of compaction style being leveled or universal without any side effects. Just my guessing, this special handling may be there because universal compaction used to have an invariant that sequence number on higher levels should not be smaller than sequence number in lower levels. File ingestion used to try to keep up to that promise by doing "sequence number stealing" from the to be assigned level. However, that invariant is no longer true after deletion triggered compaction is added for universal compaction, and we also removed the sequence stealing logic from file ingestion. Pull Request resolved: https://github.com/facebook/rocksdb/pull/13059 Test Plan: Updated existing tests Reviewed By: cbi42 Differential Revision: D64220100 Pulled By: jowlyzhang fbshipit-source-id: 70a83afba7f4c52d502c393844e6b3273d5cf628 |
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| .gitkeep | ||
| parallel-compaction.md | ||
| universal_level_assgiment.md | ||