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https://issues.apache.org/jira/browse/CASSANDRA-2407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13151951#comment-13151951
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Sylvain Lebresne commented on CASSANDRA-2407:
---------------------------------------------
Remarks:
* getNextBackgroundTask() computes the task based on all the sstables of the
CF, not only the one that are not being compacted. I believe it means that it
will always return the same sstables to compact as long as those are not
finished to be compacted (the submitBackground will then just say 'I can't mark
as compacting so return' and we will essentially only have one compaction at a
time). A simple fix would probably be to add a getNonCompactingSSTables()
method to dataTracker and use that in getNextBackgroundTask.
* submitBackground doesn't resubmit a new compaction at the end, I think we
still want to do that.
Given this ticket does have the possibility to break stuffs, I'd be more
confident delaying it to 1.1.
> Compaction thread should try to empty a bucket before moving on
> ---------------------------------------------------------------
>
> Key: CASSANDRA-2407
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2407
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Stu Hood
> Assignee: Jonathan Ellis
> Priority: Minor
> Labels: compaction
> Fix For: 1.1
>
> Attachments: 2407-v2.txt, 2407-v3.txt, 2407.txt
>
>
> As suggested by Aaron Morton
> [(1)|https://issues.apache.org/jira/browse/CASSANDRA-2191?focusedCommentId=13010077&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13010077],
> a compaction thread should attempt to empty a bucket before moving on to a
> larger bucket. This would change the submitMinorIfNeeded {{for}} loop into a
> while loop that regenerated the buckets and started from the bottom after
> each successful compaction.
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