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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-736) Add a multi-resource fair sharing metric
Date Thu, 13 Jun 2013 21:09:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13682740#comment-13682740
] 

Hadoop QA commented on YARN-736:
--------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12587698/YARN-736-1.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 4 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/1224//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/1224//console

This message is automatically generated.
                
> 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
>         Attachments: YARN-736-1.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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