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https://issues.apache.org/jira/browse/YARN-4913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15261164#comment-15261164
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Ram Venkatesh commented on YARN-4913:
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[~xgong] Here are two reasons for the -out option, both are more relevant for
large multi-GB app instances.
1. yarn logs > $targetFile produces a single file that appends all the
individual container logs. This requires (clumsy | complex) parsing to split
the files apart if you are looking for specific task or app-specific logs.
Writing to a directory will preserve the distinct files easily and also lend
itself to archiving.
2. redirecting through the console instead of writing directly to the local
filesystem apis adds additional overhead on some platforms like Windows.
>From a supportability standpoint I think this option will be useful.
> Yarn logs should take a -out option to write to a directory
> -----------------------------------------------------------
>
> Key: YARN-4913
> URL: https://issues.apache.org/jira/browse/YARN-4913
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Xuan Gong
> Assignee: Xuan Gong
> Attachments: YARN-4913.1.patch, YARN-4913.2.patch
>
>
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