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Posted to yarn-issues@hadoop.apache.org by "Arun Suresh (JIRA)" <ji...@apache.org> on 2016/12/06 15:28:58 UTC
[jira] [Updated] (YARN-5972) Add Support for Pausing/Freezing of
containers
[ https://issues.apache.org/jira/browse/YARN-5972?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arun Suresh updated YARN-5972:
------------------------------
Description:
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 would pause the VM and resume would restore it back to the running state.
If the container doesn't support preemption, then preempt would default to killing the container.
> 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
>
> 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 would pause the VM and resume would restore it back to the running state.
> If the container doesn't support preemption, then preempt would default to killing the container.
>
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