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https://issues.apache.org/jira/browse/YARN-2068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14000854#comment-14000854
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Sandy Ryza commented on YARN-2068:
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I think this is not the case. The code is slightly confusing, because
FairScheduler.java has a ResourceCalculator that it uses only for preemption.
This is going to go away with YARN-596. The scheduling policies don't make use
of this ResourceCalculator - the DominantResourceFairnessPolicy for example
doesn't use a ResourceCalculator at all because it needs to save some
intermediate results.
> FairScheduler uses the same ResourceCalculator for all policies
> ---------------------------------------------------------------
>
> Key: YARN-2068
> URL: https://issues.apache.org/jira/browse/YARN-2068
> Project: Hadoop YARN
> Issue Type: Bug
> Components: scheduler
> Affects Versions: 2.4.0
> Reporter: Karthik Kambatla
> Assignee: Sandy Ryza
>
> FairScheduler uses the same ResourceCalculator for all policies including
> DRF. Need to fix that.
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