Fix LevelCompactionPicker caused by marked_for_compaction issues

bytedance / terarkdb

A RocksDB compatible KV storage engine with better performance

Apache License 2.0

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Closed mm304321141 closed 2 years ago

mm304321141 commented 2 years ago

Problem:

LevelCompactionPicker::PickCompaction always pick files which are marked by marked_for_compaction.
If there are too many SST files have been marked, then the normal compaction would be blocked

Fix:

Add a ShouldSkipMarkedForCompaction function to skip some low score compaction markers.