volcano-gang-scheduling

Volcano PodGroups remain pending when Gang Scheduling constraints like minMember or minResources cannot be met simultaneously by the cluster. This Skill diagnoses the root cause by analyzing PodGroup constraints, cluster resource availability, and queue capacities.

To diagnose gang scheduling failures, this Skill checks cluster and queue resources against PodGroup demands and parses Kubernetes and Volcano events for specific scheduling errors. It identifies whether failures stem from insufficient simultaneous resources, resource fragmentation, or queue exhaustion.

Resource fragmentation in Volcano gang scheduling occurs when sufficient total cluster resources exist but cannot satisfy the simultaneous minResources or minMember requirements of a PodGroup. This Skill analyzes cluster resource availability to detect fragmentation and queue limitations.

To fix pending pods in distributed training jobs using Volcano, this Skill identifies if the PodGroup scheduling failure is due to insufficient simultaneous resources, resource fragmentation, or queue limitations. It guides you through resolving these specific gang scheduling constraints.

Yes, this Skill diagnoses Volcano queue exhaustion issues by checking queue capacities against PodGroup demands. It identifies queue limitations as a root cause when PodGroups fail to schedule due to unmet simultaneous requirements.