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https://issues.apache.org/jira/browse/HADOOP-3887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12619696#action_12619696
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Chris Douglas commented on HADOOP-3887:
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This will be distributed with the tarball (under docs) and posted on
hadoop.apache.org under documentation. I guess we could refer the user to the
docs distributed with Hadoop in the \-\-help message, but shouldn't this be
sufficient? Since we're talking about 0.18, isn't it redundant? I'd worry that
users of 0.17.x will, reasonably, expect to find distcp documentation where it
only exists in >0.18 releases, but I think the situation in 0.18 is acceptable.
> Distcp help needs to be more elaborated.
> ----------------------------------------
>
> Key: HADOOP-3887
> URL: https://issues.apache.org/jira/browse/HADOOP-3887
> Project: Hadoop Core
> Issue Type: Bug
> Components: documentation
> Affects Versions: 0.18.0
> Reporter: Suman Sehgal
> Priority: Minor
> Fix For: 0.18.0
>
>
> "hadoop distcp --help" command gives help regarding the execution of the
> distcp command but it doesn't give the details about copying data between
> different versions of Hadoop.
> The example displayed by the help documentation is :
> hadoop distcp -p -update "hdfs://A:8020/user/foo/bar"
> "hdfs://B:8020/user/foo/baz"
> while copying between different versions, distcp uses hftp protocol instead
> of hdfs for source path.
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