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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-80) Support delay scheduling for node locality in MR2's capacity scheduler
Date Tue, 04 Sep 2012 21:30:09 GMT

    [ https://issues.apache.org/jira/browse/YARN-80?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13448077#comment-13448077
] 

Hadoop QA commented on YARN-80:
-------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12543531/YARN-80.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  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.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    -1 core tests.  The patch failed these unit tests in hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:

                  org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestLeafQueue

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/18//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/18//console

This message is automatically generated.
                
> Support delay scheduling for node locality in MR2's capacity scheduler
> ----------------------------------------------------------------------
>
>                 Key: YARN-80
>                 URL: https://issues.apache.org/jira/browse/YARN-80
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler
>            Reporter: Todd Lipcon
>            Assignee: Arun C Murthy
>             Fix For: 2.1.0-alpha
>
>         Attachments: YARN-80.patch
>
>
> The capacity scheduler in MR2 doesn't support delay scheduling for achieving node-level
locality. So, jobs exhibit poor data locality even if they have good rack locality. Especially
on clusters where disk throughput is much better than network capacity, this hurts overall
job performance. We should optionally support node-level delay scheduling heuristics similar
to what the fair scheduler implements in MR1.

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