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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3373) Allow regions to be load-balanced by table
Date Tue, 03 Jan 2012 06:02:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13178641#comment-13178641
] 

Hadoop QA commented on HBASE-3373:
----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12509174/3373.txt
  against trunk revision .

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

    +1 tests included.  The patch appears to include 3 new or modified tests.

    -1 javadoc.  The javadoc tool appears to have generated -151 warning messages.

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

    -1 findbugs.  The patch appears to introduce 77 new Findbugs (version 1.3.9) warnings.

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

     -1 core tests.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.mapreduce.TestHFileOutputFormat
                  org.apache.hadoop.hbase.mapred.TestTableMapReduce
                  org.apache.hadoop.hbase.mapreduce.TestImportTsv

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/652//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/652//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/652//console

This message is automatically generated.
                
> Allow regions to be load-balanced by table
> ------------------------------------------
>
>                 Key: HBASE-3373
>                 URL: https://issues.apache.org/jira/browse/HBASE-3373
>             Project: HBase
>          Issue Type: Improvement
>          Components: master
>    Affects Versions: 0.20.6
>            Reporter: Ted Yu
>             Fix For: 0.94.0
>
>         Attachments: 3373.txt, HbaseBalancerTest2.java
>
>
> From our experience, cluster can be well balanced and yet, one table's regions may be
badly concentrated on few region servers.
> For example, one table has 839 regions (380 regions at time of table creation) out of
which 202 are on one server.
> It would be desirable for load balancer to distribute regions for specified tables evenly
across the cluster. Each of such tables has number of regions many times the cluster size.

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