Alejandro Abdelnur commented on YARN-796:

Wandga, previously I've missed the new doc explaining label predicates. Thanks 
for pointing it out.

How about first shooting for the following?

* RM has list of valid labels. (hot reloadable)
* NMs have list of labels. (hot reloadable)
* NMs report labels at registration time and on heartbeats when they change
* label-expressions support && (AND) only
* app able to specify a label-expression when making a resource request
* queues to AND augment the label expression with the queue label-expression

And later we can add (in a backwards compatible way)

* add support for OR and NOT to label-expressions
* add label ACLs
* centralized per NM configuration, REST API for it, etc, etc


> Allow for (admin) labels on nodes and resource-requests
> -------------------------------------------------------
>                 Key: YARN-796
>                 URL: https://issues.apache.org/jira/browse/YARN-796
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Arun C Murthy
>            Assignee: Wangda Tan
>         Attachments: LabelBasedScheduling.pdf, 
> Node-labels-Requirements-Design-doc-V1.pdf, YARN-796.patch
> It will be useful for admins to specify labels for nodes. Examples of labels 
> are OS, processor architecture etc.
> We should expose these labels and allow applications to specify labels on 
> resource-requests.
> Obviously we need to support admin operations on adding/removing node labels.

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