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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3581) Deprecate -directlyAccessNodeLabelStore in RMAdminCLI
Date Thu, 07 May 2015 18:35:01 GMT

    [ https://issues.apache.org/jira/browse/YARN-3581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533156#comment-14533156
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Wangda Tan commented on YARN-3581:
----------------------------------

Hi [~Naganarasimha],
Thanks for trying and thinking about this, assigning to you, please go ahead. 

#1/#3/#4 make sense to me

For #2, good point, I think we need add {{".."}} for {{label(...),label(...)}}, like {{"label(...),label(...)"}}.
This should in usage/help message as well. I'm open to change "( )" to "[ ]", but I'm not
sure if other shell requires escape "[..]" too. For now I prefer to keep "(...)", not adding
new syntax, but document it in help message.

In addition, similar to #2, "-replaceLabelsOnNode" has problem when admin specified multiple
"host=" in a same line without using "..". I think we should add using "..." in help message
as well. If admin forgot to add "...", we should handle it instead of ignore "host=" after
first one.

Let me know your thoughts.

Thanks,
Wangda

> Deprecate -directlyAccessNodeLabelStore in RMAdminCLI
> -----------------------------------------------------
>
>                 Key: YARN-3581
>                 URL: https://issues.apache.org/jira/browse/YARN-3581
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: api, client, resourcemanager
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>
> In 2.6.0, we added an option called "-directlyAccessNodeLabelStore" to make RM can start
with label-configured queue settings. After YARN-2918, we don't need this option any more,
admin can configure queue setting, start RM and configure node label via RMAdminCLI without
any error.
> In addition, this option is very restrictive, first it needs to run on the same node
where RM is running if admin configured to store labels in local disk.
> Second, when admin run the option when RM is running, multiple process write to a same
file can happen, this could make node label store becomes invalid.



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