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From "Miklos Szegedi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7715) Update CPU and Memory cgroups params on container update as well.
Date Thu, 11 Jan 2018 05:42:03 GMT

    [ https://issues.apache.org/jira/browse/YARN-7715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16321730#comment-16321730
] 

Miklos Szegedi commented on YARN-7715:
--------------------------------------

I would separate {{preStart}} into two functions, {{preStart}} and {{apply}}. Both would get
the container as a parameter. {{preStart}} would create the cgroup and call {{apply}}. {{apply}}
would set the cgroup settings based on the current state of the cgroup.

> Update CPU and Memory cgroups params on container update as well.
> -----------------------------------------------------------------
>
>                 Key: YARN-7715
>                 URL: https://issues.apache.org/jira/browse/YARN-7715
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Arun Suresh
>
> In YARN-6673 and YARN-6674, the cgroups resource handlers update the cgroups params for
the containers, based on opportunistic or guaranteed, in the *preStart* method.
> Now that YARN-5085 is in, Container executionType (as well as the cpu, memory and any
other resources) can be updated after the container has started. This means we need the ability
to change cgroups params after container start.



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