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Posted to yarn-issues@hadoop.apache.org by "Craig Welch (JIRA)" <ji...@apache.org> on 2015/04/20 18:56:09 UTC

[jira] [Created] (YARN-3510) Create an extension of ProportionalCapacityPreemptionPolicy which preempts a number of containers from each application in a way which respects fairness

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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