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https://issues.apache.org/jira/browse/CASSANDRA-18802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sylvain Lebresne updated CASSANDRA-18802:
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Reviewers: Sylvain Lebresne
Status: Review In Progress (was: Patch Available)
> Extend compaction interfaces to provide split points at operation start
> -----------------------------------------------------------------------
>
> Key: CASSANDRA-18802
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18802
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Local/Compaction
> Reporter: Branimir Lambov
> Assignee: Branimir Lambov
> Priority: Normal
> Attachments: CASSANDRA-18802-perf-report.html,
> image-2024-11-22-11-31-22-787.png
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The current compaction interfaces allow a compaction strategy to split at
> arbitrary points while it is writing output. In some cases (e.g. UCS) we know
> in advance where we want to split. Giving this information before the
> operation starts allows it to operate on multiple segments of the output in
> parallel, i.e. parallelize within an operation rather than between
> operations, which can reduce individual operations' duration and
> significantly improve the DB's chances of keeping up with load, especially on
> L0.
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