KEP-4671: Add Workload Aware Scheduling blog post for v1.36 by macsko · Pull Request #54667 · kubernetes/website

macsko · 2026-02-25T14:06:44Z

Description

This PR adds a blog post for Workload Aware Scheduling initiative update for v1.36

Issue

KEP: kubernetes/enhancements#4671

macsko · 2026-02-25T14:07:01Z

/sig scheduling
/area workload-aware

netlify · 2026-02-25T14:16:52Z

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…urceClaim support in the post

lmktfy

Looks good as a draft, but it's clearly not ready to merge as-is.

lmktfy · 2026-04-07T20:28:26Z

+To power this, the `kube-scheduler` features a new *PodGroup scheduling cycle* that enables atomic workload processing
+and paves the way for future enhancements. We are also rolling out the first iterations of *topology-aware scheduling*
+and *workload-aware preemption* to advance the scheduling capabilities for these workloads. Additionally,
+we have added *ResourceClaim support for workloads* to unlock *Dynamic Resource Allocation


Does "we" mean:
Maciej Skoczeń (Google),
Antoni Zawodny (Google),
Matt Matejczyk (Google),
Bartosz Rejman (Google),
Jon Huhn (Microsoft),
Maciej Wyrzuc (Google),
TBD

?

If not: reword for clarity.

lmktfy · 2026-04-07T20:29:06Z

+completely replacing the previous `v1alpha1` API version.
+
+In v1.35, Pod groups and their runtime states were embedded within the Workload resource.
+In the new model, the Workload object is rarely updated (as a template object),


What part of a Workload is immutable? Can I still set labels?

lmktfy · 2026-04-07T20:30:13Z

+        minCount: 4
+```
+
+Next, workload controllers (such as the Job controller) stamp out runtime PodGroup instances based on those templates.


Does this mean that if I have a CronJob I could end up having a new Workload created every n minutes? (If so, might be worth calling out the limitation).

lmktfy · 2026-04-07T20:37:31Z

+
+## Integration with the Job controller
+
+TBD


This part doesn't look ready to merge.

IMO we should just remove this section.

Job controller will stay alpha in 1.37 anyway for future API changes so I think its okay to skip this update for 1.36.

WDYT @helayoty?

I think adding a few sentences here would be beneficial, unless the job integration is already documented elsewhere. Since this is our only real controller integration so far, it's likely the easiest way for users to try out WAS.

There is #54489.

Okay I think its fine to add then.

Added this section, PTAL

Section has been updated and I believe it's ready now. PTAL.

graz-dev

/lgtm

k8s-ci-robot · 2026-04-20T12:17:25Z

LGTM label has been added.

Details

Git tree hash: 1fef3186689baa9f4ce0cf19ff598763a5e46557

helayoty

PTAL on the Job integration section sugget.

helayoty · 2026-04-21T20:13:30Z

+AI/ML and batch workloads introduce unique scheduling challenges that go beyond simple Pod-by-Pod scheduling.
+In Kubernetes v1.35, we introduced the first tranche of *workload-aware scheduling* improvements,
+featuring the foundational Workload API alongside basic *gang scheduling* support built on a Pod-based framework,
+and an *opportunistic batching* feature to efficiently process identical Pods.


Did we manage to integrate the opportunistic batching for gang-scheduling plugin?

Opportunistic batching is enabled by default also during gang scheduling as long as the member pods are identical

helayoty · 2026-04-21T20:17:07Z

+`scheduling.k8s.io/v1alpha2` {{< glossary_tooltip text="API group" term_id="api-group" >}},
+completely replacing the previous `v1alpha1` API version.
+
+In v1.35, Pod groups and their runtime states were embedded within the Workload resource.


I'd state in breif why this was not the good way to follow and why we decoupled PodGroup.

This paragraph describes that:

This separation also improves performance and scalability as the PodGroup API allows per-replica sharding of status updates.

lmktfy

/lgtm

with nits / quibbles.

lmktfy · 2026-04-22T20:52:19Z

+* Reaching out via [Slack (#workload-aware-scheduling)](https://kubernetes.slack.com/archives/C0AHLJ0EAEL).
+* Joining the [SIG Scheduling](https://docs.google.com/document/d/13mwye7nvrmV11q9_Eg77z-1w3X7Q1GTbslpml4J7F3A/edit)
+  or [Workload API integration](https://docs.google.com/document/d/1XSPdK4L3zkAFhAZ3hBQJr2k7JX9CpGD7NeQfujM1PT4/edit) meetings.
+* Filing a new [issue](https://github.com/kubernetes/enhancements/issues) in the Kubernetes repository.


Let's not encourage people to do this; we don't want people to file KEPs without following the recommended process.

Good catch, I wanted to link a k/k repo

k8s-ci-robot · 2026-04-22T20:52:36Z

LGTM label has been added.

Details

Git tree hash: f9005633b62f4e12bcff8cb95fa4447d0fb64239

graz-dev · 2026-04-28T12:16:05Z

/lgtm
/approve

k8s-ci-robot · 2026-04-28T12:16:13Z

LGTM label has been added.

Details

Git tree hash: c049dc812027db32939b1b4afd746aad73c5b8ad

k8s-ci-robot · 2026-04-28T12:17:02Z

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: graz-dev

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macsko mentioned this pull request Mar 3, 2026

Gang Scheduling Support in Kubernetes kubernetes/enhancements#4671

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KEP-4671: Workload Aware Scheduling blog post for v1.36

e280721

macsko force-pushed the was_blog_136 branch from 375b523 to e280721 Compare April 2, 2026 13:04

k8s-ci-robot added size/M Denotes a PR that changes 30-99 lines, ignoring generated files. and removed size/S Denotes a PR that changes 10-29 lines, ignoring generated files. labels Apr 2, 2026

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Comment thread content/en/blog/_posts/2026/workload-aware-scheduling-1-36.md Outdated

Comment thread content/en/blog/_posts/2026/workload-aware-scheduling-1-36.md

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Add PodGroup API, PodGroup scheduling cycle content, mention DRA Reso…

4735a62

…urceClaim support in the post

macsko force-pushed the was_blog_136 branch from 3122dcc to 4735a62 Compare April 3, 2026 10:37

macsko changed the title ~~KEP-4671: Workload Aware Scheduling blog post~~ KEP-4671: Add Workload Aware Scheduling blog post for v1.36 Apr 3, 2026

macsko and others added 3 commits April 3, 2026 12:09

Add future plans to the What's next section

745696a

Add a section about topology-aware scheduling

53981c7

Add DRA to WAS 1.36 blog

1c226cd

nojnhuh mentioned this pull request Apr 3, 2026

Add DRA to WAS 1.36 blog macsko/website#1

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lmktfy reviewed Apr 7, 2026

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macsko mentioned this pull request Apr 15, 2026

Kubernetes v1.36 Announcement Blog Post #55151

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k8s-ci-robot requested a review from graz-dev April 21, 2026 10:17

macsko force-pushed the was_blog_136 branch from b023b2c to 6bf2b7b Compare April 21, 2026 10:21

helayoty moved this from Needs Triage to In Progress in SIG Scheduling Apr 21, 2026

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Add a section about Job integration

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macsko force-pushed the was_blog_136 branch from 6bf2b7b to e9cb883 Compare April 22, 2026 14:38

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macsko commented Feb 25, 2026

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