[jira] [Resolved] (CASSANDRA-11433) Allow to use different algorithms to choose compaction candidates.

["Marcus Eriksson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-11433?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marcus Eriksson resolved CASSANDRA-11433.
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    Resolution: Duplicate

> 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: 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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