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Posted to issues@yunikorn.apache.org by "Craig Condit (Jira)" <ji...@apache.org> on 2024/04/01 22:32:00 UTC
[jira] [Commented] (YUNIKORN-2517) [Yunikorn] Incorrect Placeholder Count for Duplicate Task Groups in Gang scheduling
[ https://issues.apache.org/jira/browse/YUNIKORN-2517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17832963#comment-17832963 ]
Craig Condit commented on YUNIKORN-2517:
----------------------------------------
This is technically undefined behavior, as task groups need to be unique. I would submit that the current behavior is as good as any - we create the correct number of placeholders, with the specified resources. However, it's difficult to properly match a given pod with its placeholder if there are duplicate group names. We should probably keep the current behavior but log as WARN and also emit a pod event warning to let users know they have specified duplicate task groups.
> [Yunikorn] Incorrect Placeholder Count for Duplicate Task Groups in Gang scheduling
> -----------------------------------------------------------------------------------
>
> Key: YUNIKORN-2517
> URL: https://issues.apache.org/jira/browse/YUNIKORN-2517
> Project: Apache YuniKorn
> Issue Type: Bug
> Components: core - scheduler
> Reporter: Rajesh Kanhaiya Lal
> Assignee: Manikandan R
> Priority: Major
>
> Hi Team , I am getting incorrect placeholder count for the duplicate task groups in gang scheduling.
> Example :
> {code:java}
> TaskGroups: []v1alpha1.TaskGroup{
> {Name: "groupdup", MinMember: int32(3), MinResource: map[string]resource.Quantity{
> "cpu": resource.MustParse("10m"),
> "memory": resource.MustParse("10M"),
> }},
> {Name: "groupdup", MinMember: int32(5), MinResource: map[string]resource.Quantity{
> "cpu": resource.MustParse("10m"),
> "memory": resource.MustParse("10M"),
> }},
> {Name: "groupa", MinMember: int32(7), MinResource: map[string]resource.Quantity{
> "cpu": resource.MustParse("10m"),
> "memory": resource.MustParse("10M"),
> }},
> }, {code}
> for the above config, we are getting a total of 17 pods ( 2 groups. + 15 Placeholders).
> It's adding the duplicate group placeholder as well.
> Could you please take a look?
> {code:java}
> gangjob-c805x-l4fx9 1/1 Running 0 47s
> gangjob-c805x-tc8tr 1/1 Running 0 47s
> tg-appid-oqina-groupa-1ap48pr4us 1/1 Running 0 45s
> tg-appid-oqina-groupa-25t5jubyzl 1/1 Running 0 45s
> tg-appid-oqina-groupa-6oxhqxnebc 1/1 Running 0 45s
> tg-appid-oqina-groupa-bqj9nk3mdq 1/1 Running 0 45s
> tg-appid-oqina-groupa-hugxbjb3xv 1/1 Running 0 45s
> tg-appid-oqina-groupa-o46k68fhw1 1/1 Running 0 45s
> tg-appid-oqina-groupa-vs5kxeop8z 1/1 Running 0 45s
> tg-appid-oqina-groupdup-786dl3gch2 1/1 Running 0 45s
> tg-appid-oqina-groupdup-877tnd4xdl 1/1 Running 0 45s
> tg-appid-oqina-groupdup-b7yef7w47x 1/1 Running 0 45s
> tg-appid-oqina-groupdup-cdqm1fcwbo 1/1 Running 0 45s
> tg-appid-oqina-groupdup-hlxwv9to9z 1/1 Running 0 45s
> tg-appid-oqina-groupdup-mvcd5pkijw 1/1 Running 0 45s
> tg-appid-oqina-groupdup-o4d9s8d02p 1/1 Running 0 45s
> tg-appid-oqina-groupdup-srrxrukstd 1/1 Running 0 45s {code}
>
>
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