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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-600) Hook up cgroups CPU settings to the number of virtual cores allocated
Date Wed, 01 May 2013 07:08:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13646436#comment-13646436
] 

Sandy Ryza commented on YARN-600:
---------------------------------

(by which I mean YARN doesn't give hints to the OS on how and when to assign cores to processes)
                
> Hook up cgroups CPU settings to the number of virtual cores allocated
> ---------------------------------------------------------------------
>
>                 Key: YARN-600
>                 URL: https://issues.apache.org/jira/browse/YARN-600
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager, scheduler
>    Affects Versions: 2.0.3-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>
> YARN-3 introduced CPU isolation and monitoring through cgroups.  YARN-2 and introduced
CPU scheduling in the capacity scheduler, and YARN-326 will introduce it in the fair scheduler.
 The number of virtual cores allocated to a container should be used to weight the number
of cgroups CPU shares given to it.

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