Arun Suresh created YARN-4412:

             Summary: Create ClusterManager to compute ordered list of 
preferred NMs for QUEUEABLE containers
                 Key: YARN-4412
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Arun Suresh
            Assignee: Arun Suresh

Introduce a Cluster Manager that aggregates Load and Policy information from 
individual Node Managers and computes an ordered list of preferred Node 
managers to be used as target Nodes for QUEUEABLE container allocations. 

This list can be pushed out to the Node Manager (specifically the AMRMProxy 
running on the Node) via the Allocate Response. This will be used to make local 
Scheduling decisions

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