Varun Vasudev updated YARN-2440:

    Attachment: apache-yarn-2440.2.patch

Uploaded a new patch. It adds two new parameters to the YARN configuration.
1. yarn.nodemanager.containers-cpu-cores - can be set to the number of cores 
admins want YARN containers to use.
2. yarn.nodemanager.containers-cpu-percentage - can be set a percentage of 
overall CPU that admins want YARN containers to use.

By  default, we use all cores.

I've also updated the description of yarn.nodemanager.resource.cpu-vcores to 
what I think is a more accurate version.

> Cgroups should allow YARN containers to be limited to allocated cores
> ---------------------------------------------------------------------
>                 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, 
> apache-yarn-2440.2.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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