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https://issues.apache.org/jira/browse/YARN-3003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14284224#comment-14284224
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Wangda Tan commented on YARN-3003:
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Thanks for providing your thoughts!
To Naga's first point:
I think performance is one concern (as mentioned by Varun, we may need to
rewrite some part of code to make it's efficient). And we need more solid use
case / input for that. For first step, we can focus on simply receive a set of
labels as input and return a labels->nodes mapping.
To second point, I think it's important to keep it in memory, not much extra
memory needed to keep such mapping in memory.
And thanks for [~varun_saxena] working on this, one suggestion is, could you
split it to two parts, one is adding getLabelsToNodes API and implementation to
NodeLabelsManager. Another one is adding API and implementation to YarnClient.
(latter one will depends on previous one). Sounds good?
> Provide API for client to retrieve label to node mapping
> --------------------------------------------------------
>
> Key: YARN-3003
> URL: https://issues.apache.org/jira/browse/YARN-3003
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: client, resourcemanager
> Reporter: Ted Yu
> Assignee: Varun Saxena
> Attachments: YARN-3003.001.patch
>
>
> Currently YarnClient#getNodeToLabels() returns the mapping from NodeId to set
> of labels associated with the node.
> Client (such as Slider) may be interested in label to node mapping - given
> label, return the nodes with this label.
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