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https://issues.apache.org/jira/browse/HBASE-7763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13573713#comment-13573713
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Sergey Shelukhin commented on HBASE-7763:
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There's also a third thing, you can pick up more files, that way you get read
perf, low write amplification, but bursty compactions. Which is also the
problem for many people as far as I know, since they run major compactions
manually.
Agree with all the improvements above being configurable except sorting, for
sorting I am not sure. I am usually in favor of allowing people to improve perf
at the risk of shooting themselves in the foot, so as long as we make it very
explicit that they will get less guarantees than the refguide says, maybe it
should be configurable too. Not certain how important this guarantee is.
> Compactions not sorting based on size anymore.
> ----------------------------------------------
>
> Key: HBASE-7763
> URL: https://issues.apache.org/jira/browse/HBASE-7763
> Project: HBase
> Issue Type: Bug
> Components: Compaction
> Affects Versions: 0.96.0, 0.94.4
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Priority: Critical
> Fix For: 0.96.0, 0.94.6
>
> Attachments: HBASE-7763-trunk-TESTING.patch,
> HBASE-7763-trunk-TESTING.patch, HBASE-7763-trunk-TESTING.patch
>
>
> Currently compaction selection is not sorting based on size. This causes
> selection to choose larger files to re-write than are needed when bulk loads
> are involved.
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