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https://issues.apache.org/jira/browse/CASSANDRA-12366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15407824#comment-15407824
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Marcus Eriksson commented on CASSANDRA-12366:
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it looks like there are a few related dtest failures:
http://cassci.datastax.com/view/Dev/view/tjake/job/tjake-fix-compaction-ratelimit-dtest/lastCompletedBuild/testReport/
> 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 being decompressed
> * 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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