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Posted to yarn-issues@hadoop.apache.org by "Arun Suresh (JIRA)" <ji...@apache.org> on 2016/12/06 15:40:58 UTC
[jira] [Comment Edited] (YARN-5972) Add Support for
Pausing/Freezing of containers
[ https://issues.apache.org/jira/browse/YARN-5972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15725844#comment-15725844 ]
Arun Suresh edited comment on YARN-5972 at 12/6/16 3:40 PM:
------------------------------------------------------------
Created YARN-5972 branch for this work
was (Author: asuresh):
Create YARN-5972 branch for this work
> Add Support for Pausing/Freezing of containers
> ----------------------------------------------
>
> Key: YARN-5972
> URL: https://issues.apache.org/jira/browse/YARN-5972
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Arun Suresh
> Assignee: Hitesh Sharma
>
> YARN-2877 introduced OPPORTUNISTIC containers, and YARN-5216 proposes to add capability to customize how OPPORTUNISTIC containers get preempted.
> In this JIRA we propose introducing a PAUSED container state.
> Instead of preempting a running container, the container can be moved to a PAUSED state, where it remains until resources get freed up on the node then the preempted container can resume to the running state.
> Note that process freezing this is already supported by 'cgroups freezer' which is used internally by the docker pause functionality. Windows also has OS level support of a similar nature.
> One scenario where this capability is useful is work preservation. How preemption is done, and whether the container supports it, is implementation specific.
> For instance, if the container is a virtual machine, then preempt call would pause the VM and resume would restore it back to the running state.
> If the container executor / runtime doesn't support preemption, then preempt would default to killing the container.
>
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