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From "Timothy St. Clair (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-977) Interface for users/AM to know actual usage by the container
Date Fri, 26 Jul 2013 14:01:49 GMT

    [ https://issues.apache.org/jira/browse/YARN-977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13720810#comment-13720810
] 

Timothy St. Clair commented on YARN-977:
----------------------------------------

Usage statistics can also be reported via cgroups.
                
> Interface for users/AM to know actual usage by the container
> ------------------------------------------------------------
>
>                 Key: YARN-977
>                 URL: https://issues.apache.org/jira/browse/YARN-977
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Omkar Vinit Joshi
>
> Today we allocate resource (memory and cpu) and node manager starts the container with
requested resource [I am assuming they are using cgroups]. But there is definitely a possibility
of users requesting more than what they actually may need during the execution of their container/job-task.
If we add a way for users/AM to know the actual usage of the requested/completed container
then they may optimize it for next run..
> This will be helpful for AM to optimize cpu/memory resource requests by querying NM/RM
to know avg/max cpu/memory usage of the container or may be containers belonging to application.

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