[GitHub] [druid] jihoonson commented on issue #9755: why doesn't Druid delete small segments after compact task complete?

[GitBox <gi...@apache.org>]

jihoonson commented on issue #9755:
URL: https://github.com/apache/druid/issues/9755#issuecomment-618518838


   Hi @FrankChen021, Druid doesn't delete any data by itself even after compaction because you may want to revert the last compaction for some reason such as wrong compaction schema, or even a bug in compaction task. In your case, I think the auto unused segment cleanup by the coordinator may be useful. You can enable it by setting `druid.coordinator.kill.on` to true. You may also want to set `druid.coordinator.kill.durationToRetain` to avoid cleaning up unused segments too early. With this way, you can have some unused segments created by compaction for `durationToRetain` as well, but I guess it could be acceptable. 


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