• Scheduling policies (e.g., Advance Reservation, Preemption) may need to be refactored to incorporate energy efficiency and/or power-management considerations • Metrics need to be consistently exposed for all resources under WLM • … and some need to be dynamically adjustable by the WLM
Enabling Preemption. YARN FairScheduler will preempt containers running in queues that are exceeding that queue's Instantaneous FairShare when both of the following are true