Arun Suresh created YARN-3691:

             Summary: Limit number of reservations for an app
                 Key: YARN-3691
             Project: Hadoop YARN
          Issue Type: Bug
          Components: fairscheduler
            Reporter: Arun Suresh

Currently, It is possible to reserve resource for an app on all nodes. Limiting 
this to possibly just a number of nodes (or a ratio of the total cluster size) 
would improve utilization of the cluster and will reduce the possibility of 
starving other apps.

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