Ashwin Shankar created YARN-2395:
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Summary: Fair Scheduler : implement fair share preemption at
parent queue based on fairSharePreemptionTimeout
Key: YARN-2395
URL: https://issues.apache.org/jira/browse/YARN-2395
Project: Hadoop YARN
Issue Type: New Feature
Components: fairscheduler
Reporter: Ashwin Shankar
Currently in fair scheduler, the preemption logic considers fair share
starvation only at leaf queue level. This jira is created to implement it at
the parent queue as well.
It involves :
1. Making "check for fair share starvation" and "amount of resource to preempt"
recursive such that they traverse the queue hierarchy from root to leaf.
2. Currently fairSharePreemptionTimeout is a global config. We could make it
configurable on a per queue basis,so that we can specify different timeouts for
parent queues.
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