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From "Varun Vasudev (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-2531) CGroups - Admins should be allowed to enforce strict cpu limits
Date Thu, 11 Sep 2014 12:20:34 GMT

     [ https://issues.apache.org/jira/browse/YARN-2531?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Varun Vasudev updated YARN-2531:
    Attachment: apache-yarn-2531.0.patch

Uploaded patch with added config.

> 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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