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https://issues.apache.org/jira/browse/MAPREDUCE-6304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14485895#comment-14485895
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Naganarasimha G R commented on MAPREDUCE-6304:
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Thanks for the comments [~yufeldman] & [~john.jian.fang],
bq. Definitely it depends whether you want separate label for AM and the rest
of the tasks.
I have started working on this patch and had already considered the 2 kinds of
labels as ApplicationSubmissionContext was supporting it and REST has already
taken care of it .
bq. The reason is that many Hadoop users do not understand or set the labels by
themselves and they simply rely on the Hadoop platform provider (or system
admins for on-premise clusters) to set up the labels for them. I am not sure if
this is a general use case, but it is definitely a feature that we need.
Even though labels should not be dictated by RM, i feel there might be cases as
mentioned by [~john.jian.fang] where users might not be aware what each label
stands for! or users might not want to understand the label as partition (which
is more on administrative side in multi tenant scenarios) and they might just
require some auto mapping based on user or group. So i think we can come up
with some configurations of automapping based on user/group (similar to queues)
for labels too.
> Specifying node labels when submitting MR jobs
> ----------------------------------------------
>
> Key: MAPREDUCE-6304
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6304
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Reporter: Jian Fang
> Assignee: Naganarasimha G R
>
> Per the discussion on YARN-796, we need a mechanism in MAPREDUCE to specify
> node labels when submitting MR jobs.
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