Konstantinos Karanasos created YARN-4335:
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             Summary: Introducing resource request types
                 Key: YARN-4335
                 URL: https://issues.apache.org/jira/browse/YARN-4335
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Konstantinos Karanasos
            Assignee: Konstantinos Karanasos


YARN-2882 introduced container types that are internal (not user-facing) and 
are used by the ContainerManager during execution at the NM.

With this JIRA we are introducing (user-facing) resource request types that are 
used by the AM to specify the type of the ResourceRequest.

We will initially support two resource request types: CONSERVATIVE and 
OPTIMISTIC.
CONSERVATIVE resource requests will be handed internally to containers of 
GUARANTEED type, whereas OPTIMISTIC resource requests will be handed to 
QUEUEABLE containers.



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