Netflix migrated millions of batch jobs from its homegrown Compute Managed Batch (CMB) system to Kueue, an open-source Kubernetes-native job queueing system, resulting in significantly improved resource utilization across its container platform Titus. The migration, which allowed operators to switch tenants with the click of a button, brought features like preemption-based fair sharing that let teams borrow idle reserved capacity from other tenants while ensuring high-priority workloads can still preempt lower-priority ones when needed.