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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1923) Make FairScheduler resource ratio calculations terminate faster
Date Sat, 12 Apr 2014 11:22:41 GMT

    [ https://issues.apache.org/jira/browse/YARN-1923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13967479#comment-13967479
] 

Hudson commented on YARN-1923:
------------------------------

SUCCESS: Integrated in Hadoop-Yarn-trunk #538 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/538/])
YARN-1923. Make Fair Scheduler resource ratio calculations terminate faster (Anubhav Dhoot
via Sandy Ryza) (sandy: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1586796)
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/ComputeFairShares.java


> Make FairScheduler resource ratio calculations terminate faster
> ---------------------------------------------------------------
>
>                 Key: YARN-1923
>                 URL: https://issues.apache.org/jira/browse/YARN-1923
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>            Reporter: Anubhav Dhoot
>            Assignee: Anubhav Dhoot
>             Fix For: 2.5.0
>
>         Attachments: YARN-1923.002.patch, YARN-1923.patch
>
>
> In fair scheduler computing shares continues till iterations are complete even when we
have a perfect match between the resource shares and total resources. This is because the
binary search checks only less or greater and not equals. Add an early termination condition
when its equal



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