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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2943) Add a node-labels page in RM web UI
Date Thu, 11 Dec 2014 23:43:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-2943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14243371#comment-14243371

Jian He commented on YARN-2943:

- {{LOG.info("yyy");}} ?
- typo {{// Nodes will show need include Non-empty label filter}} 
- If I restart NM, “num of active NMs” is incorrect; this is probably because NM is using
ephemeral ports; 
- “<NO_LABEL>” -> “N/A”, similarly, update the previous nodes page to show
“N/A” for not labeled nodes;
- usability: <num of active NMs> link can point to a filtered list of nodes by label
- pullRMNodeLabelsInfo - it’s calculated on demand and each time loop all the nodes in the
cluster; we can probably promote Label as a separate class and internally bookkeeping the
number of NMs.

> Add a node-labels page in RM web UI
> -----------------------------------
>                 Key: YARN-2943
>                 URL: https://issues.apache.org/jira/browse/YARN-2943
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>         Attachments: Node-labels-page.png, Nodes-page-with-label-filter.png, YARN-2943.1.patch
> Now we have node labels in the system, but there's no a very convenient to get information
like "how many active NM(s) assigned to a given label?", "how much total resource for a give
label?", "For a given label, which queues can access it?", etc.
> It will be better to add a node-labels page in RM web UI, users/admins can have a centralized
view to see such information.

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