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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3964) Support NodeLabelsProvider at Resource Manager side
Date Mon, 28 Sep 2015 15:07:05 GMT

    [ https://issues.apache.org/jira/browse/YARN-3964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14933423#comment-14933423
] 

Sunil G commented on YARN-3964:
-------------------------------

Hi [~Naganarasimha Garla]
I had this concern also earlier. {{updateNodeLabelsInternal}} is looping on all nodes in cluster,
and its been triggered from a timer (30 mins default). I feel as nodes are more in cluster,
and  response time from {{nodeLabelsMappingProvider.getNodeLabels}} may also be more. So I
feel its upto the nodeLabelsMappingProvider to have a better filtering mechanism and some
pre-computed information to skip non-changed nodes to improve the response time of api. Not
sure whether RM could do more here.

> Support NodeLabelsProvider at Resource Manager side
> ---------------------------------------------------
>
>                 Key: YARN-3964
>                 URL: https://issues.apache.org/jira/browse/YARN-3964
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Dian Fu
>            Assignee: Dian Fu
>         Attachments: YARN-3964 design doc.pdf, YARN-3964.002.patch, YARN-3964.003.patch,
YARN-3964.004.patch, YARN-3964.005.patch, YARN-3964.006.patch, YARN-3964.007.patch, YARN-3964.007.patch,
YARN-3964.008.patch, YARN-3964.009.patch, YARN-3964.010.patch, YARN-3964.011.patch, YARN-3964.012.patch,
YARN-3964.1.patch
>
>
> Currently, CLI/REST API is provided in Resource Manager to allow users to specify labels
for nodes. For labels which may change over time, users will have to start a cron job to update
the labels. This has the following limitations:
> - The cron job needs to be run in the YARN admin user.
> - This makes it a little complicate to maintain as users will have to make sure this
service/daemon is alive.
> Adding a Node Labels Provider in Resource Manager will provide user more flexibility.



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