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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-2340) optimize JobInProgress.initTasks()
Date Tue, 08 Mar 2011 06:21:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13003827#comment-13003827
] 

Hadoop QA commented on MAPREDUCE-2340:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12471555/MAPREDUCE-2340.patch
  against trunk revision 1078964.

    +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 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 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 core unit tests.

    -1 contrib tests.  The patch failed contrib unit tests.

    +1 system test framework.  The patch passed system test framework compile.

Test results: https://hudson.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/125//testReport/
Findbugs warnings: https://hudson.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/125//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://hudson.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/125//console

This message is automatically generated.

> optimize JobInProgress.initTasks()
> ----------------------------------
>
>                 Key: MAPREDUCE-2340
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2340
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobtracker
>    Affects Versions: 0.20.1, 0.21.0
>            Reporter: Kang Xiao
>         Attachments: MAPREDUCE-2340.patch, MAPREDUCE-2340.patch
>
>
> JobTracker's hostnameToNodeMap cache can speed up JobInProgress.initTasks() and JobInProgress.createCache()
significantly. A test for 1 job with 100000 maps on a 2400 cluster shows nearly 10 and 50
times speed up for initTasks() and createCache(). 

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