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Date: Thu, 21 Aug 2014 01:41:22 +0000 (UTC)
From: "Wangda Tan (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12652117.1370907497973.9420.1408585282344@arcas>
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References: <JIRA.12652117.1370907497973@arcas>
Subject: [jira] [Commented] (YARN-796) Allow for (admin) labels on nodes and
 resource-requests
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    [ https://issues.apache.org/jira/browse/YARN-796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14104926#comment-14104926 ] 

Wangda Tan commented on YARN-796:
---------------------------------

bq. As I've said before, I basically want something similar to the health check code: I provide something executable that the NM can run at runtime that will provide the list of labels. If we need to add labels, it's updating the script which is a much smaller footprint than redeploying HADOOP_CONF_DIR everywhere.
I understand now, it's meaningful since it's a flexible way for admin to set labels in NM side. Maybe add a {{NodeLabelCheckerService}} to NM similar to {{NodeHealthCheckerService}} should work. I'll create a separated JIRA for setting labels in NM side under this ticket and leave design/implementation discussion 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
>    Affects Versions: 2.4.1
>            Reporter: Arun C Murthy
>            Assignee: Wangda Tan
>         Attachments: LabelBasedScheduling.pdf, Node-labels-Requirements-Design-doc-V1.pdf, Node-labels-Requirements-Design-doc-V2.pdf, YARN-796.node-label.demo.patch.1, YARN-796.patch, YARN-796.patch4
>
>
> 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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