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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2531) CGroups - Admins should be allowed to enforce strict cpu limits
Date Thu, 11 Sep 2014 12:56:34 GMT

    [ https://issues.apache.org/jira/browse/YARN-2531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14129974#comment-14129974
] 

Hadoop QA commented on YARN-2531:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12668046/apache-yarn-2531.0.patch
  against trunk revision 4be9517.

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

    {color:green}+1 tests included{color}.  The patch appears to include 1 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}.  There were no new javadoc 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
2.0.3) 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-api
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager.

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

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/4890//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/4890//console

This message is automatically generated.

> CGroups - Admins should be allowed to enforce strict cpu limits
> ---------------------------------------------------------------
>
>                 Key: YARN-2531
>                 URL: https://issues.apache.org/jira/browse/YARN-2531
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>         Attachments: apache-yarn-2531.0.patch
>
>
> From YARN-2440 -
> {quote} 
> The other dimension to this is determinism w.r.t performance. Limiting to allocated cores
overall (as well as per container later) helps orgs run workloads and reason about them deterministically.
One of the examples is benchmarking apps, but deterministic execution is a desired option
beyond benchmarks too.
> {quote}
> It would be nice to have an option to let admins to enforce strict cpu limits for apps
for things like benchmarking, etc. By default this flag should be off so that containers can
use available cpu but admin can turn the flag on to determine worst case performance, etc.



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