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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12890) Provide a way to throttle the number of regions moved by the balancer
Date Tue, 21 Jul 2015 20:06:06 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14635722#comment-14635722
] 

Hadoop QA commented on HBASE-12890:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12693449/HBASE-12890.patch
  against master branch at commit 5ec5552be0534dbf4b07ef6607741ae6f9ab0495.
  ATTACHMENT ID: 12693449

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

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 hadoop versions{color}. The patch compiles with all supported hadoop versions
(2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.0 2.7.0)

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

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

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 checkstyle{color}.  The applied patch does not increase the total number
of checkstyle errors

    {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:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

  {color:green}+1 site{color}.  The mvn post-site goal succeeds with this patch.

     {color:red}-1 core tests{color}.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.mapreduce.TestImportExport
                  org.apache.hadoop.hbase.util.TestProcessBasedCluster

     {color:red}-1 core zombie tests{color}.  There are 1 zombie test(s): 	at org.apache.sentry.tests.e2e.hive.TestPrivilegesAtTableScope.testTableViewJoin4(TestPrivilegesAtTableScope.java:401)

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/14853//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/14853//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/14853//artifact/patchprocess/checkstyle-aggregate.html

  Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/14853//console

This message is automatically generated.

> Provide a way to throttle the number of regions moved by the balancer
> ---------------------------------------------------------------------
>
>                 Key: HBASE-12890
>                 URL: https://issues.apache.org/jira/browse/HBASE-12890
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.98.10
>            Reporter: churro morales
>            Assignee: churro morales
>             Fix For: 2.0.0, 0.98.14, 1.3.0
>
>         Attachments: HBASE-12890.patch
>
>
> We have a very large cluster and we frequently add remove quite a few regionservers from
our cluster.  Whenever we do this the balancer moves thousands of regions at once.  Instead
we provide a configuration parameter: hbase.balancer.max.regions.  This limits the number
of regions that are balanced per iteration.  



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