[ https://issues.apache.org/jira/browse/YARN-23?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13470339#comment-13470339
]
Hudson commented on YARN-23:
----------------------------
Integrated in Hadoop-Mapreduce-trunk #1217 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1217/])
YARN-23. FairScheduler: FSQueueSchedulable#updateDemand() - potential redundant aggregation.
(kkambatl via tucu) (Revision 1394321)
Result = SUCCESS
tucu : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1394321
Files :
* /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/FSQueueSchedulable.java
* /hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFSQueueSchedulable.java
> FairScheduler: FSQueueSchedulable#updateDemand() - potential redundant aggregation
> ----------------------------------------------------------------------------------
>
> Key: YARN-23
> URL: https://issues.apache.org/jira/browse/YARN-23
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: scheduler
> Affects Versions: 2.0.0-alpha
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Fix For: 2.0.3-alpha
>
> Attachments: trunk-MR-4518.patch, trunk-MR-4518.patch, YARN-23.patch, YARN-23.patch
>
>
> In FS, FSQueueSchedulable#updateDemand() limits the demand to maxTasks only after iterating
though all the pools and computing the final demand.
> By checking if the demand has reached maxTasks in every iteration, we can avoid redundant
work, at the expense of one condition check every iteration.
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