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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-736) Add a multi-resource fair sharing metric
Date Thu, 11 Jul 2013 14:09:57 GMT

    [ https://issues.apache.org/jira/browse/YARN-736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13705855#comment-13705855
] 

Hudson commented on YARN-736:
-----------------------------

Integrated in Hadoop-Mapreduce-trunk #1484 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1484/])
    updating CHANGES.txt after committing MAPREDUCE-5333,HADOOP-9661,HADOOP-9355,HADOOP-9673,HADOOP-9414,HADOOP-9416,HDFS-4797,YARN-866,YARN-736,YARN-883
to 2.1-beta branch (Revision 1502075)

     Result = SUCCESS
tucu : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1502075
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt

                
> Add a multi-resource fair sharing metric
> ----------------------------------------
>
>                 Key: YARN-736
>                 URL: https://issues.apache.org/jira/browse/YARN-736
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>    Affects Versions: 2.0.4-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>             Fix For: 2.1.0-beta
>
>         Attachments: YARN-736-1.patch, YARN-736-2.patch, YARN-736-3.patch, YARN-736-4.patch,
YARN-736.patch
>
>
> Currently, at a regular interval, the fair scheduler computes a fair memory share for
each queue and application inside it.  This fair share is not used for scheduling decisions,
but is displayed in the web UI, exposed as a metric, and used for preemption decisions.
> With DRF and multi-resource scheduling, assigning a memory share as the fair share metric
to every queue no longer makes sense.  It's not obvious what the replacement should be, but
probably something like fractional fairness within a queue, or distance from an ideal cluster
state.

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