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From "Craig Welch (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-3510) Create an extension of ProportionalCapacityPreemptionPolicy which preempts a number of containers from each application in a way which respects fairness
Date Mon, 20 Apr 2015 16:56:09 GMT
Craig Welch created YARN-3510:
---------------------------------

             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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