[
https://issues.apache.org/jira/browse/CASSANDRA-6142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jonathan Ellis updated CASSANDRA-6142:
--------------------------------------
Summary: Remove multithreaded compaction (and precompactedrow) (was:
Remove multithreaded compaction)
> Remove multithreaded compaction (and precompactedrow)
> -----------------------------------------------------
>
> Key: CASSANDRA-6142
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6142
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Jonathan Ellis
> Priority: Minor
> Fix For: 2.1 beta1
>
>
> There is at best a very small sweet spot for multithreaded compaction
> (ParallelCompactionIterable). For large rows, we stall the pipeline and fall
> back to a single LCR pass. For small rows, the overhead of the coordination
> outweighs the benefits of parallelization (45s to compact 2x1M stress rows
> with multithreading enabled, vs 35 with it disabled).
--
This message was sent by Atlassian JIRA
(v6.2#6252)
