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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1290) Let continuous scheduling achieve more balanced task assignment
Date Fri, 01 Nov 2013 13:36:33 GMT

    [ https://issues.apache.org/jira/browse/YARN-1290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13811248#comment-13811248
] 

Hudson commented on YARN-1290:
------------------------------

SUCCESS: Integrated in Hadoop-Hdfs-trunk #1570 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1570/])
YARN-1290. Let continuous scheduling achieve more balanced task assignment (Wei Yan via Sandy
Ryza) (sandy: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1537731)
* /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/FairScheduler.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/TestFairScheduler.java


> Let continuous scheduling achieve more balanced task assignment
> ---------------------------------------------------------------
>
>                 Key: YARN-1290
>                 URL: https://issues.apache.org/jira/browse/YARN-1290
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Wei Yan
>            Assignee: Wei Yan
>             Fix For: 2.3.0
>
>         Attachments: YARN-1290.patch, YARN-1290.patch, YARN-1290.patch, YARN-1290.patch,
main.pdf
>
>
> Currently, in continuous scheduling (YARN-1010), in each round, the thread iterates over
pre-ordered nodes and assigns tasks. This mechanism may overload the first several nodes,
while the latter nodes have no tasks.
> We should sort all nodes according to available resource. In each round, always assign
tasks to nodes with larger capacity, which can balance the load distribution among all nodes.



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