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https://issues.apache.org/jira/browse/HDFS-3971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13463192#comment-13463192
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Robert Joseph Evans commented on HDFS-3971:
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It almost sounds like you want to turn this into something like rsync. I think
it would be much more useful to just add in an rsync command with a simmilar
set of features and flags then trying to reinvent it piecemeal. Then it can
look at time stamps on the files, and possibly checksums as well, to pick up
where it left off on a failure.
> Add a resume feature to the copyFromLocal and put commands
> ----------------------------------------------------------
>
> Key: HDFS-3971
> URL: https://issues.apache.org/jira/browse/HDFS-3971
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: tools
> Affects Versions: 2.0.1-alpha
> Reporter: Adam Muise
> Priority: Minor
> Fix For: 2.0.1-alpha
>
>
> Add a resume feature to the copyFromLocal command. Failures in large
> transfers result in a great deal of wasted time. For large files, it would be
> good to be able to continue from the last good block onwards. The file would
> have to be unavailable to other clients for reads or regular writes until the
> "resume" process was completed.
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