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https://issues.apache.org/jira/browse/YARN-2440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14107248#comment-14107248
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Sandy Ryza commented on YARN-2440:
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We removed it because it wasn't consistent with the vmem-pmem-ratio and was an 
unnecessary layer of indirection. If automatically configuring a node's vcore 
resource based on its physical characteristics is a goal, I wouldn't be opposed 
to adding something back in.

For the purposes of this JIRA, might it be simpler to express a config in terms 
of the % of the node's CPU power that YARN gets?

> 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, apache-yarn-2440.1.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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