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https://issues.apache.org/jira/browse/YARN-23?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karthik Kambatla updated YARN-23:
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Attachment: YARN-23.patch
Rebased the patch against trunk.
> FairScheduler: FSQueueSchedulable#updateDemand() - potential redundant
> aggregation
> ----------------------------------------------------------------------------------
>
> Key: YARN-23
> URL: https://issues.apache.org/jira/browse/YARN-23
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: scheduler
> Affects Versions: 2.1.0-alpha
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Attachments: trunk-MR-4518.patch, trunk-MR-4518.patch, YARN-23.patch,
> YARN-23.patch
>
>
> In FS, FSQueueSchedulable#updateDemand() limits the demand to maxTasks only
> after iterating though all the pools and computing the final demand.
> By checking if the demand has reached maxTasks in every iteration, we can
> avoid redundant work, at the expense of one condition check every iteration.
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