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From "Craig Welch (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2494) [YARN-796] Node label manager API and storage implementations
Date Mon, 22 Sep 2014 19:32:35 GMT

    [ https://issues.apache.org/jira/browse/YARN-2494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14143665#comment-14143665
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Craig Welch commented on YARN-2494:
-----------------------------------

The other day [~vinodkv] suggested changing the addLabel removeLabel ... api's to addNodeLabel
removeNodeLabel... to make it more clear (and presumably make adding other possible types
of labels in the future more smooth).  This would not effect the label apis, the node-to-label
ones are ok already, I think.  Thoughts?  

> [YARN-796] Node label manager API and storage implementations
> -------------------------------------------------------------
>
>                 Key: YARN-2494
>                 URL: https://issues.apache.org/jira/browse/YARN-2494
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>         Attachments: YARN-2494.patch, YARN-2494.patch, YARN-2494.patch, YARN-2494.patch
>
>
> This JIRA includes APIs and storage implementations of node label manager,
> NodeLabelManager is an abstract class used to manage labels of nodes in the cluster,
it has APIs to query/modify
> - Nodes according to given label
> - Labels according to given hostname
> - Add/remove labels
> - Set labels of nodes in the cluster
> - Persist/recover changes of labels/labels-on-nodes to/from storage
> And it has two implementations to store modifications
> - Memory based storage: It will not persist changes, so all labels will be lost when
RM restart
> - FileSystem based storage: It will persist/recover to/from FileSystem (like HDFS), and
all labels and labels-on-nodes will be recovered upon RM restart



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