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From "Jonathan Ellis (JIRA)" <>
Subject [jira] [Resolved] (CASSANDRA-1187) make the number of compaction threads configurable
Date Mon, 11 Apr 2011 22:21:05 GMT


Jonathan Ellis resolved CASSANDRA-1187.

    Resolution: Duplicate

following up in CASSANDRA-1876 and CASSANDRA-2191

> make the number of compaction threads configurable
> --------------------------------------------------
>                 Key: CASSANDRA-1187
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Sean Bridges
>         Attachments: CASSANDRA-1187-2.patch, CASSANDRA-1187.patch
> On our test machines, compaction is the limiting factor when we are writing to Cassandra.
 It's easy to write to Cassandra faster than the single compaction thread can keep up, leading
to a large number of sstables.
> In one extreme example, we inserted a TB of data into a single cassandra node overnight,
and ended up with 100,000 sstables, which took another two days to finish compacting.
> If the number of compaction threads was configurable, we could tune cassandra to support
a higher write workload.

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