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Posted to issues@yunikorn.apache.org by "Weiwei Yang (Jira)" <ji...@apache.org> on 2021/08/13 19:03:00 UTC
[jira] [Comment Edited] (YUNIKORN-796) Pod scheduling could
disproportionately concentrate on one node
[ https://issues.apache.org/jira/browse/YUNIKORN-796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17398868#comment-17398868 ]
Weiwei Yang edited comment on YUNIKORN-796 at 8/13/21, 7:02 PM:
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I think there are a few things that need to be checked
# pod affinity/anti-affinity
# node affinity/anti-affinity
# node used resources in YK's view (via REST API)
# is reservation enabled or disabled? check logs and see if there are pods got reserved on some nodes
[~yuchaoran2011] pls let us know if you have more findings
was (Author: wwei):
I think there are a few things that need to be checked
# pod affinity/anti-affinity
# node affinity/anti-affinity
# node used resources in YK's view (via REST API)
# is reservation enabled or disabled? check logs and see if there are pods got reserved on some nodes
[~yuchaoran2011] pls let us know if you have more findings
> Pod scheduling could disproportionately concentrate on one node
> ---------------------------------------------------------------
>
> Key: YUNIKORN-796
> URL: https://issues.apache.org/jira/browse/YUNIKORN-796
> Project: Apache YuniKorn
> Issue Type: Bug
> Components: core - scheduler
> Reporter: Chaoran Yu
> Priority: Major
>
> We've observed a few cases when YK keeps scheduling incoming pods to just one node, even though the cluster has many other nodes that have abundant resources. Not sure what could be causing this behavior because we don't see it in every K8s cluster we have. Maybe somewhere in the node sorting algorithm, a node could be favored over all other nodes under some conditions?
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