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Posted to yarn-issues@hadoop.apache.org by "Yufei Gu (JIRA)" <ji...@apache.org> on 2019/05/01 00:06:00 UTC
[jira] [Commented] (YARN-9520) fair scheduler:
inter-queue-preemption.enabled, intra-queue-preemption.enabled options
[ https://issues.apache.org/jira/browse/YARN-9520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16830769#comment-16830769 ]
Yufei Gu commented on YARN-9520:
--------------------------------
* inter-queue preemption will not happen among the applications of inside the queue.
Yes.
* FIFO ordering policy the newer applications will preempted first if the priority is same or not set. In other words, the older applications will considered for preemption only after the newer applications are preempted.
No. Only the oldest one has less chance to be preempted. All others have the same chance.
* multiple applications of a queue will run if resources are available. lets say there are resources for 200 containers, 2 applications of 100 containers will run. after 50 containers of each finished does the 3rd containers will get allocated? or it will wait for first 2 applications will finish?
Yes. The 3rd one can run.
> fair scheduler: inter-queue-preemption.enabled, intra-queue-preemption.enabled options
> --------------------------------------------------------------------------------------
>
> Key: YARN-9520
> URL: https://issues.apache.org/jira/browse/YARN-9520
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Reporter: Sudhir Babu Pothineni
> Priority: Major
>
> Its good to have inter-queue-preemption-enabled, intra-queue-preemption-enabled options for fair scheduler, i have a use case where we need inter-queue-preemption-enabled=false
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