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https://issues.apache.org/jira/browse/YARN-6808?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arun Suresh updated YARN-6808:
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Attachment: YARN-6808.001.patch
Attaching initial patch to vet the idea.
* Currently, only the allocation patch is implemented - the Auto-promote aspect
needs some more bookkeeping and can probably be handled in a separate JIRA
* It essentially checks if the incomning requests from an app exceeds its
headroom.. and if so, are returned OPPORTUNISTIC containers.
* I have added a test case in TestCapacityScheduler, but the change is pretty
Scheduler Agnostic.
> Allow Schedulers to return OPPORTUNISTIC containers when queues go over
> configured capacity
> -------------------------------------------------------------------------------------------
>
> Key: YARN-6808
> URL: https://issues.apache.org/jira/browse/YARN-6808
> Project: Hadoop YARN
> Issue Type: New Feature
> Reporter: Arun Suresh
> Assignee: Arun Suresh
> Attachments: YARN-6808.001.patch
>
>
> This is based on discussions with [~kasha] and [~kkaranasos].
> Currently, when a Queues goes over capacity, apps on starved queues must wait
> either for containers to complete or for them to be pre-empted by the
> scheduler to get resources.
> This JIRA proposes to allow Schedulers to:
> # Allocate all containers over the configured queue capacity/weight as
> OPPORTUNISTIC.
> # Auto-promote running OPPORTUNISTIC containers of apps as and when their
> GUARANTEED containers complete.
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