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rocksdb/unreleased_history/behavior_changes/drop_range_tombstone.md

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Drop range tombstone during non-bottommost compaction (#11459) Summary: Similar to point tombstones, we can drop a range tombstone during compaction when we know its range does not exist in any higher level. This PR adds this optimization. Some existing test in db_range_del_test is fixed to work under this optimization. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11459 Test Plan: * Add unit test `DBRangeDelTest, NonBottommostCompactionDropRangetombstone`. * Ran crash test that issues range deletion for a few hours: `python3 tools/db_crashtest.py blackbox --simple --write_buffer_size=1048576 --delrangepercent=10 --writepercent=31 --readpercent=40` Reviewed By: ajkr Differential Revision: D46007904 Pulled By: cbi42 fbshipit-source-id: 3f37205b6778b7d55ed106369ca41b0632a6d0fd
1 year ago
RocksDB will try to drop range tombstones during non-bottommost compaction when it is safe to do so. (#11459)