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From "zhihai xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-2756) use static variable (Resources.none()) for not-running Node.resource in CommonNodeLabelsManager to save memory.
Date Mon, 27 Oct 2014 23:06:33 GMT

     [ https://issues.apache.org/jira/browse/YARN-2756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

zhihai xu updated YARN-2756:
----------------------------
    Description: 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.  (was: 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.)

> 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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