Junping Du updated YARN-311:
    Component/s: graceful

> Dynamic node resource configuration: core scheduler changes
> -----------------------------------------------------------
>                 Key: YARN-311
>                 URL: https://issues.apache.org/jira/browse/YARN-311
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: graceful, resourcemanager, scheduler
>            Reporter: Junping Du
>            Assignee: Junping Du
>             Fix For: 2.3.0
>         Attachments: YARN-311-v1.patch, YARN-311-v10.patch, 
> YARN-311-v11.patch, YARN-311-v12.patch, YARN-311-v12b.patch, 
> YARN-311-v13.patch, YARN-311-v2.patch, YARN-311-v3.patch, YARN-311-v4.patch, 
> YARN-311-v4.patch, YARN-311-v5.patch, YARN-311-v6.1.patch, 
> YARN-311-v6.2.patch, YARN-311-v6.patch, YARN-311-v7.patch, YARN-311-v8.patch, 
> YARN-311-v9.patch
> As the first step, we go for resource change on RM side and expose admin APIs 
> (admin protocol, CLI, REST and JMX API) later. In this jira, we will only 
> contain changes in scheduler. 
> The flow to update node's resource and awareness in resource scheduling is: 
> 1. Resource update is through admin API to RM and take effect on RMNodeImpl.
> 2. When next NM heartbeat for updating status comes, the RMNode's resource 
> change will be aware and the delta resource is added to schedulerNode's 
> availableResource before actual scheduling happens.
> 3. Scheduler do resource allocation according to new availableResource in 
> SchedulerNode.
> For more design details, please refer proposal and discussions in parent 
> JIRA: YARN-291.

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