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Posted to yarn-dev@hadoop.apache.org by "Botong Huang (JIRA)" <ji...@apache.org> on 2017/10/11 18:58:00 UTC

[jira] [Created] (YARN-7317) Fix overallocation resulted from ceiling in LocalityMulticastAMRMProxyPolicy

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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