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https://issues.apache.org/jira/browse/YARN-2440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14106889#comment-14106889
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Nathan Roberts commented on YARN-2440:
--------------------------------------

Thanks Varun for the patch. I'm wondering if it would be possible to make this 
configurable at the system level and per-app. For example, I'd like an 
application to be able to specify that it wants to run with strict container 
limits (to verify SLA's for example), but in general I don't want these limits 
in place (why not let a container use additional CPU if it's available?). 

> Cgroups should limit YARN containers to cores allocated in yarn-site.xml
> ------------------------------------------------------------------------
>
>                 Key: YARN-2440
>                 URL: https://issues.apache.org/jira/browse/YARN-2440
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>         Attachments: apache-yarn-2440.0.patch, 
> screenshot-current-implementation.jpg
>
>
> The current cgroups implementation does not limit YARN containers to the 
> cores allocated in yarn-site.xml.



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