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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6109) Improve RIT performances during assignment on large clusters
Date Wed, 30 May 2012 18:24:23 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13285876#comment-13285876

Hadoop QA commented on HBASE-6109:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 26 new or modified tests.

    +1 hadoop2.0.  The patch compiles against the hadoop 2.0 profile.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    -1 findbugs.  The patch appears to cause Findbugs (version 1.3.9) to fail.

    +1 release audit.  The applied patch does not increase the total number of release audit

     -1 core tests.  The patch failed these unit tests:

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/2056//testReport/
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/2056//console

This message is automatically generated.
> Improve RIT performances during assignment on large clusters
> ------------------------------------------------------------
>                 Key: HBASE-6109
>                 URL: https://issues.apache.org/jira/browse/HBASE-6109
>             Project: HBase
>          Issue Type: Improvement
>          Components: master
>    Affects Versions: 0.96.0
>            Reporter: nkeywal
>            Assignee: nkeywal
>            Priority: Minor
>             Fix For: 0.96.0
>         Attachments: 6109.v19.patch, 6109.v21.patch, 6109.v7.patch
> The main points in this patch are:
>  - lowering the number of copy of the RIT list
>  - lowering the number of synchronization
>  - synchronizing on a region rather than on everything
> It also contains:
>  - some fixes around the RIT notification: the list was sometimes modified without a
corresponding 'notify'.
>  - some tests flakiness correction, actually unrelated to this patch.

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