Inigo Goiri commented on YARN-1011:

The doc looks good. I have a couple questions:
# What would be the first policy to implement? I guess we can define it in 
# Would it make sense to make over-subscription a global property set by the RM 
instead of per-node?
I think we need a sub-task under this umbrella for the over-subscription 

> [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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