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https://issues.apache.org/jira/browse/HADOOP-2984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12605001#action_12605001
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Koji Noguchi commented on HADOOP-2984:
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+1.
bq. It's also worth noting that if another client is still writing to a source
file, the copy will likely fail.
Maybe also mention,
* if any source files are deleted after distcp has started, mappers would fail
(with file not found).
* If speculative execution is turned on as 'final', behavior of distcp is
undefined.
bq. It's worth giving some examples of -update and -overwrite.
I always had trouble with these options.
Could you show how the target directory structures look like after the distcp?
(with and without -update/overwrite option)
> Distcp should have forrest documentation
> ----------------------------------------
>
> Key: HADOOP-2984
> URL: https://issues.apache.org/jira/browse/HADOOP-2984
> Project: Hadoop Core
> Issue Type: Task
> Components: util
> Reporter: Owen O'Malley
> Assignee: Chris Douglas
> Priority: Blocker
> Fix For: 0.18.0
>
> Attachments: 2984-0.patch, 2984-1.patch, 2984-2.patch
>
>
> We really should have a page on how to use distcp.
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