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Posted to yarn-issues@hadoop.apache.org by "Jonathan Hung (Jira)" <ji...@apache.org> on 2019/10/15 16:54:00 UTC
[jira] [Updated] (YARN-9671) Improve Locality Scheduling when
cluster is busy
[ https://issues.apache.org/jira/browse/YARN-9671?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Hung updated YARN-9671:
--------------------------------
Target Version/s: 3.3.0, 2.10.1 (was: 2.10.0, 3.3.0)
> Improve Locality Scheduling when cluster is busy
> ------------------------------------------------
>
> Key: YARN-9671
> URL: https://issues.apache.org/jira/browse/YARN-9671
> Project: Hadoop YARN
> Issue Type: Improvement
> Affects Versions: 2.10.0, 3.3.0
> Reporter: Muhammad Samir Khan
> Assignee: Muhammad Samir Khan
> Priority: Major
> Attachments: YARN-9671.001.patch
>
>
> When a cluster is very busy, scheduling opportunities are few and far between. Scheduling opportunities are how an application knows when to give up looking for decent locality.
> It doesn't make sense to work hard waiting for locality when the odds of it coming are very small and it may actually take a very long time to actually give up.
> This causes the priority of queues to be violated which is the last thing we want to do when the cluster is full.
> Add a mode to disable skipping locality when cluster is busy.
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