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
