<ul><li>Kubernetes v1.32 introduces QueueingHint, a scheduling context element that improves Pod scheduling throughput.</li><li>The Kubernetes scheduler stores all unscheduled Pods in an internal component called the scheduling queue.</li><li>Prior to v1.32, scheduling retries for unschedulable Pods were executed for no reason.</li><li>QueueingHint subscribes to a particular kind of cluster event to decide if each incoming event could make the Pod schedulable.</li><li>QueueingHint implementation started in version v1.28 with a few in-tree plugins, and eventually implemented in all the plugins by v1.32.</li><li>KEP-4247: Per-plugin callback functions for efficient requeueing in the scheduling queue.</li><li>Join Kubernetes SIG Scheduling for more information on these features.</li><li>The scheduling queue consists of ActiveQ, BackoffQ, and Unschedulable Pod Pool.</li><li>All scheduling features are implemented as plugins and processed in phases called cycles.</li><li>QueueingHint improves the scheduler's retries for previously unschedulable Pods that could now be scheduled due to changes in the cluster.</li></ul>

Kubernetes v1.32: QueueingHint Brings a New Possibility to Optimize Pod Scheduling

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