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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3784) maxActiveApplications(|PerUser) per queue is too low for small clusters
Date Fri, 03 Feb 2012 12:53:54 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199671#comment-13199671
] 

Hudson commented on MAPREDUCE-3784:
-----------------------------------

Integrated in Hadoop-Hdfs-trunk #945 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/945/])
    MAPREDUCE-3784. Fixed CapacityScheduler so that maxActiveApplications and maxActiveApplicationsPerUser
per queue are not too low for small clusters. Contributed by Arun C Murthy.

vinodkv : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1239971
Files : 
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CSQueueUtils.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/LeafQueue.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestApplicationLimits.java

                
> maxActiveApplications(|PerUser) per queue is too low for small clusters
> -----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3784
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3784
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Ramya Sunil
>            Assignee: Arun C Murthy
>             Fix For: 0.23.1
>
>         Attachments: MAPREDUCE-3784.patch, MAPREDUCE-3784.patch, MAPREDUCE-3784.patch,
MAPREDUCE-3784.patch, MAPREDUCE-3784.patch
>
>
> We ran into this issue while testing on small clusters. 
> On a 7node cluster with 8G per node,  for a queue with absolute capacity 30%, user limit
100%, maxActiveApplications and maxActiveApplicationsPerUser is calculated to be 1.
> This means that even though the queue has 17GB(0.3*8*7), only 1 user can run 1 app at
a given time queuing up rest of the apps/users. This hurts performance on small clusters.

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