Ashwin Shankar created YARN-2394:

             Summary: Fair Scheduler : ability to configure 
fairSharePreemptionThreshold per queue
                 Key: YARN-2394
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: fairscheduler
            Reporter: Ashwin Shankar

Preemption based on fair share starvation happens when usage of a queue is less 
than 50% of its fair share. This 50% is hardcoded. We'd like to make this 
configurable on a per queue basis, so that we can choose the threshold at which 
we want to preempt. Calling this config "fairSharePreemptionThreshold". 

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