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https://issues.apache.org/jira/browse/YARN-1011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15072302#comment-15072302
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Wangda Tan commented on YARN-1011:
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Thanks,

bq. Makes sense. Doubt there is any scheduler-specific smarts here. If at all 
we need to do them separately, it is most likely because our scheduler 
abstractions are not clean.
Agree!

> [Umbrella] Schedule containers based on utilization of currently allocated 
> containers
> -------------------------------------------------------------------------------------
>
>                 Key: YARN-1011
>                 URL: https://issues.apache.org/jira/browse/YARN-1011
>             Project: Hadoop YARN
>          Issue Type: New Feature
>            Reporter: Arun C Murthy
>         Attachments: yarn-1011-design-v0.pdf
>
>
> Currently RM allocates containers and assumes resources allocated are 
> utilized.
> RM can, and should, get to a point where it measures utilization of allocated 
> containers and, if appropriate, allocate more (speculative?) containers.



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