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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-2462) Review compaction heuristic and move compaction code out so standalone and independently testable
Date Fri, 23 Mar 2012 21:47:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13237171#comment-13237171
] 

stack commented on HBASE-2462:
------------------------------

Finished making compactiontool standalone over in hbase-5616.  Thats been committed.
                
> Review compaction heuristic and move compaction code out so standalone and independently
testable
> -------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-2462
>                 URL: https://issues.apache.org/jira/browse/HBASE-2462
>             Project: HBase
>          Issue Type: Improvement
>          Components: performance
>            Reporter: stack
>            Assignee: Jonathan Gray
>            Priority: Critical
>              Labels: moved_from_0_20_5
>         Attachments: 2462v2.txt, standalone.txt
>
>
> Anything that improves our i/o profile makes hbase run smoother.  Over in HBASE-2457,
good work has been done already describing the tension between minimizing compactions versus
minimizing count of store files.  This issue is about following on from what has been done
in 2457 but also, breaking the hard-to-read compaction code out of Store.java out to a standalone
class that can be the easier tested (and easily analyzed for its performance characteristics).
> If possible, in the refactor, we'd allow specification of alternate merge sort implementations.


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