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https://issues.apache.org/jira/browse/CASSANDRA-4153?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christian Spriegel updated CASSANDRA-4153:
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Attachment: OptimizeTruncate_v1.diff
Added patch
> Optimize truncate when snapshots are disabled or keyspace not durable
> ---------------------------------------------------------------------
>
> Key: CASSANDRA-4153
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4153
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Christian Spriegel
> Priority: Minor
> Attachments: OptimizeTruncate_v1.diff
>
>
> My goal is to make truncate to be less IO intensive so that my junit tests
> run faster (as already explained in CASSANDRA-3710). I think I have now a
> solution which does not change too much:
> I created a patch that optimizes three things within truncate:
> - Skip the whole Commitlog.forceNewSegment/discardCompletedSegments, if
> durable_writes are disabled for the keyspace.
> - With CASSANDRA-3710 implemented, truncate does not need to flush memtables
> to disk when snapshots are disabled.
> - Reduce the sleep interval
> The patch works nicely for me. Applying it and disabling
> durable_writes/autoSnapshot increased the speed of my testsuite vastly. I
> hope I did not overlook something.
> Let me know if my patch needs cleanup. I'd be glad to change it, if it means
> the patch will get accepted.
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