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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3568) Optimize Job's progress calculations in MR AM
Date Tue, 27 Dec 2011 18:46:30 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13176263#comment-13176263
] 

Hadoop QA commented on MAPREDUCE-3568:
--------------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12508693/MAPREDUCE-3568-20111227.txt
  against trunk revision .

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

    +1 tests included.  The patch appears to include 15 new or modified tests.

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

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

    +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 passed unit tests in .

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

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1510//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1510//console

This message is automatically generated.
                
> Optimize Job's progress calculations in MR AM
> ---------------------------------------------
>
>                 Key: MAPREDUCE-3568
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3568
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mr-am, mrv2, performance
>    Affects Versions: 0.23.0
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Vinod Kumar Vavilapalli
>            Priority: Critical
>             Fix For: 0.23.1
>
>         Attachments: MAPREDUCE-3568-20111215.1.txt, MAPREDUCE-3568-20111220.txt, MAPREDUCE-3568-20111222.txt,
MAPREDUCE-3568-20111227.txt
>
>
> Besides catering to client requests, Job progress is calculated in every heartbeat to
the RM so as to print the MR AM's progress. Today the map and reduce progresses are calculated
by looking up of each task in a big map while we can simply make do with a scan and aggregate.
With large number of tasks, this can make a difference.

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