Craig Welch created YARN-3510:
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Summary: Create an extension of
ProportionalCapacityPreemptionPolicy which preempts a number of containers from
each application in a way which respects fairness
Key: YARN-3510
URL: https://issues.apache.org/jira/browse/YARN-3510
Project: Hadoop YARN
Issue Type: Improvement
Components: yarn
Reporter: Craig Welch
Assignee: Craig Welch
The ProportionalCapacityPreemptionPolicy preempts as many containers from
applications as it can during it's preemption run. For fifo this makes sense,
as it is prempting in reverse order & therefore maintaining the primacy of the
"oldest". For fair ordering this does not have the desired effect - instead,
it should preempt a number of containers from each application which maintains
a fair balance /close to a fair balance between them
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