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From "zhihai xu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-2756) use static variable (Resources.none()) for not-running Node.resource in CommonNodeLabelsManager to save memory.
Date Mon, 27 Oct 2014 23:05:35 GMT
zhihai xu created YARN-2756:
-------------------------------

             Summary: use static variable (Resources.none()) for not-running Node.resource
in CommonNodeLabelsManager to save memory.
                 Key: YARN-2756
                 URL: https://issues.apache.org/jira/browse/YARN-2756
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: zhihai xu
            Assignee: zhihai xu
            Priority: Minor


use static variable (Resources.none()) for not-running Node.resource in CommonNodeLabelsManager
to save memory. When a Node is not activated, the resource is never used, When a Node is activated,
a new resource will be assigned to it in RMNodeLabelsManager#activateNode (nm.resource = resource;)
So it would be better to use static variable Resources.none() instead of allocating a new
variable(Resource.newInstance(0, 0)) for each node deactivation.



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