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https://issues.apache.org/jira/browse/HBASE-3797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13028604#comment-13028604
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Nicolas Spiegelberg edited comment on HBASE-3797 at 5/4/11 5:01 AM:
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Combined patch for HBASE-3797 & HBASE-1476. I did not split them up because
>50% of HBASE-1476 is refactoring code written for HBASE-3797. Most of the
comments I got internally about HBASE-3797 were pertaining to those deprecated
code segments, so I wanted to save myself some grief on the external review :)
Note that I am having problems creating a Review Board account on
review.apache.org, or I would post this up (2000+ line patch).
was (Author: nspiegelberg):
Combined patch for HBASE-3767 & HBASE-1476. I did not split them up
because >50% of HBASE-1476 is refactoring code written for HBASE-3767. Most of
the comments I got internally about HBASE-3767 were pertaining to those
deprecated code segments, so I wanted to save myself some grief on the external
review :) Note that I am having problems creating a Review Board account on
review.apache.org, or I would post this up (2000+ line patch).
> StoreFile Level Compaction Locking
> ----------------------------------
>
> Key: HBASE-3797
> URL: https://issues.apache.org/jira/browse/HBASE-3797
> Project: HBase
> Issue Type: Improvement
> Reporter: Nicolas Spiegelberg
> Assignee: Nicolas Spiegelberg
> Priority: Minor
> Attachments: HBASE-3797+1476.patch
>
>
> Multithreaded compactions (HBASE-1476) will solve the problem of major
> compactions clogging high-priority minor compactions. However, there is
> still a problem here. Since compactions are store-level, the store
> undergoing major compaction will have it's storefile count increase during
> the major. We really need a way to allow multiple outstanding compactions
> per store. compactSelection() should lock/reserve the files being used for
> compaction. This will also allow us to know what we're going to compact when
> inserting into the CompactSplitThread and make more informed priority
> queueing decisions.
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