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https://issues.apache.org/jira/browse/YARN-2494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153526#comment-14153526
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Wangda Tan commented on YARN-2494:
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I feel the "Cluster" is almost a super set of "Collection". I prefer what
[~cwelch] suggested set of method name.
Maybe {{ClusterNodeLabelsCollection}} is slightly clear than
{{ClusterNodeLabels}}, but its name is too long I think :)
> [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, 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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