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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-5035) FairScheduler: Adjust maxAssign dynamically when assignMultiple is turned on
Date Tue, 03 May 2016 16:56:13 GMT
Karthik Kambatla created YARN-5035:
--------------------------------------

             Summary: FairScheduler: Adjust maxAssign dynamically when assignMultiple is turned
on
                 Key: YARN-5035
                 URL: https://issues.apache.org/jira/browse/YARN-5035
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: fairscheduler
    Affects Versions: 2.8.0
            Reporter: Karthik Kambatla
            Assignee: Karthik Kambatla


When assignMultiple is turned on, today the number of containers allocated to node within
a single heartbeat is determined by maxAssign. Picking a higher value for this prevents the
spreading of the workload, and a smaller number leads to slow ramp up. 

The proposal is to make it dynamic - half of the unallocated resources on the node. 



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