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https://issues.apache.org/jira/browse/CASSANDRA-11433?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei Deng updated CASSANDRA-11433:
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Labels: lcs performance (was: performance)
> Allow to use different algorithms to choose compaction candidates.
> ------------------------------------------------------------------
>
> Key: CASSANDRA-11433
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11433
> Project: Cassandra
> Issue Type: Improvement
> Components: Compaction
> Reporter: Dikang Gu
> Assignee: Dikang Gu
> Labels: lcs, performance
>
> I'm experimenting different algorithms for choosing the compaction
> candidates, for leveled compaction.
> Instead of the round robin selection by default, one of our experiment is to
> choose the candidates with least overlapping sstable sizes. And I see
> significant drop of cpu usage, and reduce of compacted bytes count, in one of
> our write heavy system.
> I think it's useful to make it configurable for how to choose the compaction
> candidates.
> The idea is from rocksdb. (http://rocksdb.org/blog/2921/compaction_pri/).
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