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From "Miklos Szegedi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6384) Add configuratin to set max cpu usage when strict-resource-usage is false with cgroups
Date Mon, 16 Oct 2017 17:57:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16206295#comment-16206295

Miklos Szegedi commented on YARN-6384:

Thank you for the patch [~lolee_k],
not to break backward compatibility and issues are easier to debug in a default cluster.
Please fix the outstanding checkstyle issues.
Just a note on the overall design. I think the patch does it correctly, it allows a higher
limit to be set in case of strict mode, not affecting non-strict mode. In a future jira we
may consider mixing the two, allowing weights to be set with a strict limit. However, that
would be a breaking change, since strict and non-strict mode are not distinct anymore.

> Add configuratin to set max cpu usage when strict-resource-usage is false with cgroups
> --------------------------------------------------------------------------------------
>                 Key: YARN-6384
>                 URL: https://issues.apache.org/jira/browse/YARN-6384
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: dengkai
>         Attachments: YARN-6384-0.patch, YARN-6384-1.patch, YARN-6384-2.patch, YARN-6384-3.patch
> When using cgroups on yarn, if yarn.nodemanager.linux-container-executor.cgroups.strict-resource-usage
is false, user may get very more cpu time than expected based on the vcores. There should
be a upper limit even resource-usage is not strict, just like a percentage which user can
get more than promised by vcores. I think it's important in a shared cluster.

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