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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6861) Separate Balancer specific logic form Dispatcher
Date Tue, 19 Aug 2014 22:09:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14102935#comment-14102935
] 

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

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12662699/h6861_20140819.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 4 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.server.namenode.ha.TestPipelinesFailover
                  org.apache.hadoop.hdfs.server.datanode.TestBPOfferService

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/7682//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/7682//console

This message is 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
>            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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