SIG Scheduling Intro & Updates
Talkat KubeCon + CloudNativeCon Europe 2025 · on Friday, 2025-04-04· at 14:30· Level 3 | ICC Capital Suite 14-16·
summary
Kube-scheduler adds concrete performance changes: queuing hints let the queue ignore irrelevant node events so pending Pods retry far less often, async preemption fires deletion API calls off the critical scheduling path by reserving slots so cycles keep moving, and popping from the back-of-queue when active is empty uses resources instead of idling. These changes plus device-array support and partitionable multi-host devices land in 1.33 and improve some large-cluster scenarios by roughly 20% throughput; Kueue, Kwok and the scheduler simulator are updated to integrate and test these features.
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chapters (17)
- 0:00SIG Scheduling intro
- 1:03Command Scheduler overview
- 6:44Command Scheduler updates
- 7:07Performance focus & queuing hints
- 12:34Async preemption for throughput
- 15:07Popping pods from backoff
- 18:34Device allocation with claims
- 21:28Kubernetes 1.33 updates
- 21:50Queue sub-project updates
- 22:56Scheduler sub-project updates
- 24:01Scheduler Simulator updates
- 25:06Get involved in SIG Scheduling
- 26:16Q&A: Q vs Scheduler
- 27:40Q&A: Monitoring queues
- 28:22Q&A: Autoscaling workloads
- 29:27Q&A: Pod groups support
- 30:14Closing remarks
