Optimize truncate when snapshots are disabled or keyspace not durable
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Key: CASSANDRA-4153
URL: https://issues.apache.org/jira/browse/CASSANDRA-4153
Project: Cassandra
Issue Type: Improvement
Reporter: Christian Spriegel
Priority: Minor
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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