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From "zhangshilong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-6045) apps/queues that have no pending containers will still affect the efficiency of scheduling
Date Fri, 30 Dec 2016 06:34:58 GMT
zhangshilong created YARN-6045:
----------------------------------

             Summary: apps/queues that have no pending containers will still affect the efficiency
of scheduling
                 Key: YARN-6045
                 URL: https://issues.apache.org/jira/browse/YARN-6045
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: fairscheduler
    Affects Versions: 2.7.1
         Environment: jdk 1.7
kernel:2.6.32-431.20.3.el6
            Reporter: zhangshilong
            Assignee: zhangshilong


Sorting queues/apps consumes a significant amount of time during a single container allocation.
Each time a container is assigned, all queues / apps are sorted by hierarchy.
In practice, many queues / apps without pending container  do not need to participate in the
sort.
Without the need for resources, apps / queues do not participate in sorting, scheduling performance
will increase a lot.




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