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https://issues.apache.org/jira/browse/YARN-9045?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhaohui Xin updated YARN-9045:
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Attachment: image-2018-11-21-23-18-41-366.png
> Container's cpu usage limit should be soft with a relaxation factor
> -------------------------------------------------------------------
>
> Key: YARN-9045
> URL: https://issues.apache.org/jira/browse/YARN-9045
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: nodemanager
> Affects Versions: 2.6.0, 3.1.1
> Reporter: Zhaohui Xin
> Assignee: Zhaohui Xin
> Priority: Major
> Attachments: image-2018-11-21-23-18-41-366.png
>
>
> There are two modes in yarn container cpu limitation. The default is Shared
> mode which guarantees the requested resource and can also use other spare CPU
> if avaliable. Another one is Strict mode, container's resource is limited to
> allocated resource strictly.
> If we want to limit the resource usage of the container and can use a certain
> percentage of spare CPU if available, the above two modes cannot satisfy our
> demand. We can define a relax
> coefficient(yarn.nodemanager.linux-container-executor.cgroups.strict-resource-usage.ratio)
> to relax the restrictions on resources in strict mode.
>
> Share Mode，
>
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