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https://issues.apache.org/jira/browse/YARN-8250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16506296#comment-16506296
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Haibo Chen commented on YARN-8250:
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Ping [~asuresh].
> Create another implementation of ContainerScheduler to support NM
> overallocation
> --------------------------------------------------------------------------------
>
> Key: YARN-8250
> URL: https://issues.apache.org/jira/browse/YARN-8250
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Haibo Chen
> Assignee: Haibo Chen
> Priority: Major
> Attachments: YARN-8250-YARN-1011.00.patch,
> YARN-8250-YARN-1011.01.patch, YARN-8250-YARN-1011.02.patch
>
>
> YARN-6675 adds NM over-allocation support by modifying the existing
> ContainerScheduler and providing a utilizationBased resource tracker.
> However, the implementation adds a lot of complexity to ContainerScheduler,
> and future tweak of over-allocation strategy based on how much containers
> have been launched is even more complicated.
> As such, this Jira proposes a new ContainerScheduler that always launch
> guaranteed containers immediately and queues opportunistic containers. It
> relies on a periodical check to launch opportunistic containers.
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