Dikang Gu created CASSANDRA-11433:
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Summary: 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
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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