Add "concurrent_compactions" configuration
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Key: CASSANDRA-2558
URL: https://issues.apache.org/jira/browse/CASSANDRA-2558
Project: Cassandra
Issue Type: Improvement
Components: Core
Affects Versions: 0.8 beta 1
Reporter: Sylvain Lebresne
Assignee: Sylvain Lebresne
Priority: Trivial
Fix For: 0.8.0
We should expose a way to configure the max number of thread to use when
multi_threaded compaction is turned on. So far, it uses nb_of_processors
thread, which if you have many cores may be unreasonably high (as far as random
IO is concerned and thus independently of compaction throttling)... at least
unless you have SSD.
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