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Date: Fri, 6 Jan 2012 06:59:42 +0000 (UTC)
From: "Hudson (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-3373) Allow regions to be load-balanced
 by table
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    [ https://issues.apache.org/jira/browse/HBASE-3373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181169#comment-13181169 ] 

Hudson commented on HBASE-3373:
-------------------------------

Integrated in HBase-TRUNK-security #65 (See [https://builds.apache.org/job/HBase-TRUNK-security/65/])
    HBASE-3373 Allow regions to be load-balanced by table

tedyu : 
Files : 
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
* /hbase/trunk/src/test/java/org/apache/hadoop/hbase/TestRegionRebalancing.java

                
> 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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