zhihai xu created YARN-2756:
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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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