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Posted to yarn-issues@hadoop.apache.org by "Bikas Saha (JIRA)" <ji...@apache.org> on 2013/05/23 21:01:21 UTC

[jira] [Created] (YARN-723) Yarn default value of physical cpu cores to virtual core is 2

Bikas Saha created YARN-723:
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             Summary: Yarn default value of physical cpu cores to virtual core is 2
                 Key: YARN-723
                 URL: https://issues.apache.org/jira/browse/YARN-723
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Bikas Saha


The default virtual core allocation in the RM is 1. That means every container will get 1 virtual core == 1/2 a physical core. Not sure if this breaks implicit MR assumptions of maps/reduces getting at least 1 physical cpu.

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