[
https://issues.apache.org/jira/browse/YARN-4781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16433090#comment-16433090
]
Eric Payne commented on YARN-4781:
----------------------------------
bq. Hence in case we use sizeBasedWeight, we are considering pending as well.
So i had this doubt..
I see what you mean. Good catch. I was not considering the {{sizeBasedWeight}}
case. My first thought was to just use the
{{FairOrderingPolicy#FairComparator}}, but that is for {{SchedulableEntity}}s
like {{FiCaschedulingApp}}, and the {{PriorityQueue}}s in
{{FifoIntraQueuePreemptionPlugin}} are sorting {{TempAppPerPartition}}s, so I
wouldn't be able to combine this feature with the
{{FifoIntraQueuePreemptionPlugin}}.
It may be worthwhile to go back to your previous suggestion about splitting out
common functionality into an abstract {{AbstractIntraQueuePreemptionPlugin}}
class and sub-classing FiFo and Fair puligins.
> Support intra-queue preemption for fairness ordering policy.
> ------------------------------------------------------------
>
> Key: YARN-4781
> URL: https://issues.apache.org/jira/browse/YARN-4781
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: scheduler
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Priority: Major
> Attachments: YARN-4781.001.patch, YARN-4781.002.patch,
> YARN-4781.003.patch
>
>
> We introduced fairness queue policy since YARN-3319, which will let large
> applications make progresses and not starve small applications. However, if a
> large application takes the queue’s resources, and containers of the large
> app has long lifespan, small applications could still wait for resources for
> long time and SLAs cannot be guaranteed.
> Instead of wait for application release resources on their own, we need to
> preempt resources of queue with fairness policy enabled.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
