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From "Yuliya Feldman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-796) Allow for (admin) labels on nodes and resource-requests
Date Tue, 22 Jul 2014 09:02:43 GMT

    [ https://issues.apache.org/jira/browse/YARN-796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14070039#comment-14070039

Yuliya Feldman commented on YARN-796:

To everybody that were so involved in providing input for last couple of days
I can provide support for App, Queue and Queue Label Policy Expression support.
 Also did some performance measurements - with 1000 entries with nodes and their labels it
takes about additional 700 ms to process 1mln requests (hot cache). If will need reevaluate
on every ResourceRequest within App performance will go down
This should cover 
label-expressions support && (AND) only
app able to specify a label-expression when making a resource request - kind of (do per application
at the moment, not per every resource request)
queues to AND augment the label expression with the queue label-expression
add support for OR and NOT to label-expressions

As far as 
RM has list of valid labels. (hot reloadable)
NMs have list of labels. (hot reloadable)
With file in DFS you can get hot reloadable valid (unless somebody makes typo) labels on RM

[~wangda] - How do you want to proceed here?

> 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,
> 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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