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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6861) Separate Balancer specific logic form Dispatcher
Date Sat, 02 May 2015 04:49:06 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14524880#comment-14524880
] 

Hadoop QA commented on HDFS-6861:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | patch |   0m  1s | The patch command could not apply the patch during
dryrun. |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12662699/h6861_20140819.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / f1a152c |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/10642/console |


This message was automatically generated.

> Separate Balancer specific logic form Dispatcher
> ------------------------------------------------
>
>                 Key: HDFS-6861
>                 URL: https://issues.apache.org/jira/browse/HDFS-6861
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: balancer & mover
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>         Attachments: h6861_20140818.patch, h6861_20140819.patch
>
>
> In order to balance datanode storage utilization of a cluster, Balancer (1) classifies
datanodes into different groups (overUtilized, aboveAvgUtilized, belowAvgUtilized and underUtilized),
(2) chooses source and target datanode pairs and (3) chooses blocks to move.  Some of these
logic are in Dispatcher.  It is better to separate them out.  This JIRA is a further work
of HDFS-6828.



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