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From "Botong Huang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-7317) Fix overallocation resulted from ceiling in LocalityMulticastAMRMProxyPolicy
Date Wed, 11 Oct 2017 18:58:00 GMT
Botong Huang created YARN-7317:
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             Summary: Fix overallocation resulted from ceiling in LocalityMulticastAMRMProxyPolicy
                 Key: YARN-7317
                 URL: https://issues.apache.org/jira/browse/YARN-7317
             Project: Hadoop YARN
          Issue Type: Task
            Reporter: Botong Huang
            Assignee: Botong Huang
            Priority: Minor


When LocalityMulticastAMRMProxyPolicy is splitting up the ANY requests into different subclusters,
we are doing Ceil(N * weight), leading to overallocation overall. It is better to do Floor(N
* weight) for each subcluster and then assign the residue randomly according to the weights.
So that the total number of containers we ask from all subclusters sum up to be N. 



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