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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13316) Reduce the downtime on planned moves of regions
Date Thu, 26 Mar 2015 20:32:53 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14382609#comment-14382609
] 

Hadoop QA commented on HBASE-13316:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12707549/PlannedFailover-v2.patch
  against master branch at commit 69f6a2e7b44d33e01866928672700cde1366f429.
  ATTACHMENT ID: 12707549

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

    {color:green}+1 tests included{color}.  The patch appears to include 7 new or modified
tests.

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

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

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

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

                {color:red}-1 checkstyle{color}.  The applied patch generated 1930 checkstyle
errors (more than the master's current 1929 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 site goal succeeds with this patch.

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

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/13445//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13445//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/13445//artifact/patchprocess/checkstyle-aggregate.html

                Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/13445//console

This message is automatically generated.

> Reduce the downtime on planned moves of regions
> -----------------------------------------------
>
>                 Key: HBASE-13316
>                 URL: https://issues.apache.org/jira/browse/HBASE-13316
>             Project: HBase
>          Issue Type: Improvement
>          Components: Balancer
>    Affects Versions: 2.0.0, 1.0.1, 1.1.1
>            Reporter: Sameet Agarwal
>            Assignee: Sameet Agarwal
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: PlannedFailover-v1.patch, PlannedFailover-v2.patch, PlannedFailover.patch
>
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> The current behavior of a region move shuts down a region and then starts is up in another
regionserver. This causes increased latency and possibly timeouts till the new region's cache
is fully warmed up. We can make a region move less disruptive by warming the cache in the
destination region server before shutting dow the old region.
>  



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