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https://issues.apache.org/jira/browse/YARN-1011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15072227#comment-15072227
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Wangda Tan commented on YARN-1011:
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Thanks [~kasha] and also comments from [~elgoiri]. Looked at doc, it looks good.

Some questions/comments:
- For resource oversubscription enable/disable for individual nodes, I think 
it's very important since some nodes could be more important than others. Do 
you think is it fine to add a configuration item to each NM's yarn-site.xml?
- For scheduler-side implementation, instead of modifying individual scheduler, 
I think we should try to add over-subscription policy to common scheduling 
layer since it doesn't sounds very related to specific scheduler implementation.

I also agree for the first implementation, we can simply assume nodes have more 
resource to use. CS shouldn't have issue with this assumption.

> [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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