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Posted to yarn-issues@hadoop.apache.org by "Nathan Roberts (JIRA)" <ji...@apache.org> on 2015/03/23 16:03:11 UTC

[jira] [Created] (YARN-3388) userlimit isn't playing well with DRF calculator

Nathan Roberts created YARN-3388:
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             Summary: userlimit isn't playing well with DRF calculator
                 Key: YARN-3388
                 URL: https://issues.apache.org/jira/browse/YARN-3388
             Project: Hadoop YARN
          Issue Type: Bug
          Components: capacityscheduler
    Affects Versions: 2.6.0
            Reporter: Nathan Roberts
            Assignee: Nathan Roberts


When there are multiple active users in a queue, it should be possible for those users to make use of capacity up-to max_capacity (or close). The resources should be fairly distributed among the active users in the queue. This works pretty well when there is a single resource being scheduled.   However, when there are multiple resources the situation gets more complex and the current algorithm tends to get stuck at Capacity. 

Example illustrated in subsequent comment.











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