hadoop权威指南(第四版)要点翻译(8)——Chapter 4. YARN(3)

m) In normal operation, the Capacity Scheduler does not preempt containers by forcibly killing them,so if a queue is under capacity due to lack of demand, and then demand increases, the queue will only return to capacity as resources are released from other queues as containers complete. It is possible to mitigate this by configuring queues with a maximum capacity so that they don’t eat into other queues’ capacities too much. This is at the cost of queue elasticity, of course, so a reasonable trade-off should be found by trial and error. m) In normal operation, the Capacity Schedu