Wangda Tan created YARN-5864: -------------------------------- Summary: Capacity Scheduler preemption for fragmented cluster Key: YARN-5864 URL: https://issues.apache.org/jira/browse/YARN-5864 Project: Hadoop YARN Issue Type: New Feature Reporter: Wangda Tan Assignee: Wangda Tan
YARN-4390 added preemption for reserved container. However, we found one case that large container cannot be allocated even if all queues are under their limit. For example, we have: {code} Two queues, a and b, capacity 50:50 Two nodes: n1 and n2, each of them have 50 resource Now queue-a uses 10 on n1 and 10 on n2 queue-b asks for one single container with resource=45. {code} The container could be reserved on any of the host, but no preemption will happen because all queues are under their limits. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org