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Marcus Eriksson commented on CASSANDRA-11035:
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this checks row overlap (ie, both partition key and clustering needs to be the
same) so if the user reads full partitions they might hit too many sstables if
we do no compaction.
We could do a partition overlap based compaction if there are no row overlap
though?
> Use cardinality estimation to pick better compaction candidates for STCS
> (SizeTieredCompactionStrategy)
> -------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-11035
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11035
> Project: Cassandra
> Issue Type: Improvement
> Components: Compaction
> Reporter: Wei Deng
> Assignee: Marcus Eriksson
>
> This was initially mentioned in this blog post
> http://www.datastax.com/dev/blog/improving-compaction-in-cassandra-with-cardinality-estimation
> but I couldn't find any existing JIRA for it. As stated by [~jbellis],
> "Potentially even more useful would be using cardinality estimation to pick
> better compaction candidates. Instead of blindly merging sstables of a
> similar size a la SizeTieredCompactionStrategy." The L0 STCS in LCS should
> benefit as well.
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