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https://issues.apache.org/jira/browse/YARN-6673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16312476#comment-16312476
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Miklos Szegedi commented on YARN-6673:
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[~yangjiandan], would not that allow opportunistic containers to steal CPU
cycles from guaranteed ones by setting the vcores to arbitrary size like 512?
[~haibochen], is there an upper limit to vcores in RM?
> Add cpu cgroup configurations for opportunistic containers
> ----------------------------------------------------------
>
> Key: YARN-6673
> URL: https://issues.apache.org/jira/browse/YARN-6673
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Haibo Chen
> Assignee: Miklos Szegedi
> Fix For: 3.0.0-beta1
>
> Attachments: YARN-6673.000.patch
>
>
> In addition to setting cpu.cfs_period_us on a per-container basis, we could
> also set cpu.shares to 2 for opportunistic containers so they are run on a
> best-effort basis
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