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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-12366) Fix compaction throttle
Date Tue, 02 Aug 2016 16:49:20 GMT
T Jake Luciani created CASSANDRA-12366:
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             Summary: Fix compaction throttle
                 Key: CASSANDRA-12366
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12366
             Project: Cassandra
          Issue Type: Bug
          Components: Compaction
            Reporter: T Jake Luciani
            Assignee: T Jake Luciani
             Fix For: 3.x


Compaction throttling is broken in the following ways:

  * It throttles bytes read after compression
  * Compaction creates multiple scanners which share the rate limiter causing too much throttling
  * It bears no resemblance to the reported compaction time remaining calculation (Bytes of
source sstables processed since start of compaction)

To fix this we need to simplify the throttling to be only at the CompactionIterator level.



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