Wangda Tan commented on YARN-314:

Actually I'm not quite sure about this proposal, what's the benefit of putting 
all apps' requests together comparing to hold one data structure per app, is 
there any use case?

> Schedulers should allow resource requests of different sizes at the same 
> priority and location
> ----------------------------------------------------------------------------------------------
>                 Key: YARN-314
>                 URL: https://issues.apache.org/jira/browse/YARN-314
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: scheduler
>    Affects Versions: 2.0.2-alpha
>            Reporter: Sandy Ryza
>         Attachments: yarn-314-prelim.patch
> Currently, resource requests for the same container and locality are expected 
> to all be the same size.
> While it it doesn't look like it's needed for apps currently, and can be 
> circumvented by specifying different priorities if absolutely necessary, it 
> seems to me that the ability to request containers with different resource 
> requirements at the same priority level should be there for the future and 
> for completeness sake.

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