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https://issues.apache.org/jira/browse/HADOOP-9209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13561736#comment-13561736
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Daryn Sharp commented on HADOOP-9209:
-------------------------------------
I hesitate to add implementation details, or refs to javadocs in the shell
output. Would it suffice for the help output to say "This is an inefficient
operation"?
> Add shell command to dump file checksums
> ----------------------------------------
>
> Key: HADOOP-9209
> URL: https://issues.apache.org/jira/browse/HADOOP-9209
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs, tools
> Affects Versions: 3.0.0, 2.0.3-alpha
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-9209.txt, hadoop-9209.txt
>
>
> Occasionally while working with tools like distcp, or debugging certain
> issues, it's useful to be able to quickly see the checksum of a file. We
> currently have the APIs to efficiently calculate a checksum, but we don't
> expose it to users. This JIRA is to add a "fs -checksum" command which dumps
> the checksum information for the specified file(s).
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