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From "Sean Bridges (JIRA)" <>
Subject [jira] Created: (CASSANDRA-1187) make the number of compaction threads configurable
Date Sun, 13 Jun 2010 22:43:14 GMT
make the number of compaction threads configurable

                 Key: CASSANDRA-1187
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
    Affects Versions: 0.6.1
            Reporter: Sean Bridges

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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