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https://issues.apache.org/jira/browse/YARN-4692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15153434#comment-15153434
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Wangda Tan commented on YARN-4692:
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[~asuresh],
Thanks for reply, I can understand your concern now.
There're two different container priorities:
- Across application container priority, this inherits application priority,
and we have ACL and/or quota ensures not everybody can claim their containers
are most important.
- Container priority within an app, application can decide which container
should be allocated first and which container should be preempted first.
While doing preemption,
- For across application priority, framework should strictly enforce it.
- For priority within an application, when scheduler puts container to
to-be-preempted list, application will be notified, and it has chance to return
another container other than selected.
Thoughts?
> [Umbrella] Simplified and first-class support for services in YARN
> ------------------------------------------------------------------
>
> Key: YARN-4692
> URL: https://issues.apache.org/jira/browse/YARN-4692
> Project: Hadoop YARN
> Issue Type: New Feature
> Reporter: Vinod Kumar Vavilapalli
> Assignee: Vinod Kumar Vavilapalli
> Attachments:
> YARN-First-Class-And-Simplified-Support-For-Services-v0.pdf
>
>
> YARN-896 focused on getting the ball rolling on the support for services
> (long running applications) on YARN.
> I’d like propose the next stage of this effort: _Simplified and first-class
> support for services in YARN_.
> The chief rationale for filing a separate new JIRA is threefold:
> - Do a fresh survey of all the things that are already implemented in the
> project
> - Weave a comprehensive story around what we further need and attempt to
> rally the community around a concrete end-goal, and
> - Additionally focus on functionality that YARN-896 and friends left for
> higher layers to take care of and see how much of that is better integrated
> into the YARN platform itself.
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