Srikanth Kandula commented on YARN-4081:

Extending to multiple resources is great, but why use a Map? Is there a rough 
idea how many different resources one may want to encode? It seems an overkill 
to incur so much additional overhead if say all that is needed is a handful of 
more resources. Ditto for encapsulating strings in URIs and the 
ResourceInformation wrapper over doubles. It would perhaps have been okay if 
this datastructure was less often used but if i understand correctly, Resources 
is created/destroyed at least once per ask/ assignment and often many more 

> Add support for multiple resource types in the Resource class
> -------------------------------------------------------------
>                 Key: YARN-4081
>                 URL: https://issues.apache.org/jira/browse/YARN-4081
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>         Attachments: YARN-4081-YARN-3926.001.patch
> For adding support for multiple resource types, we need to add support for 
> this in the Resource class.

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