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https://issues.apache.org/jira/browse/YARN-7317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Botong Huang updated YARN-7317:
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Attachment: YARN-7317.v2.patch
Thanks [~curino] for the review, v2 patch uploaded.
> Fix overallocation resulted from ceiling in LocalityMulticastAMRMProxyPolicy
> ----------------------------------------------------------------------------
>
> Key: YARN-7317
> URL: https://issues.apache.org/jira/browse/YARN-7317
> Project: Hadoop YARN
> Issue Type: Task
> Reporter: Botong Huang
> Assignee: Botong Huang
> Priority: Minor
> Attachments: YARN-7317.v1.patch, YARN-7317.v2.patch
>
>
> When LocalityMulticastAMRMProxyPolicy is splitting up the ANY requests into
> different subclusters, we are doing Ceil(N * weight), leading to
> overallocation overall. It is better to do Floor(N * weight) for each
> subcluster and then assign the residue randomly according to the weights. So
> that the total number of containers we ask from all subclusters sum up to be
> N.
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