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https://issues.apache.org/jira/browse/HDFS-222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12747622#action_12747622
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Owen O'Malley commented on HDFS-222:
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I've said it before, but just to reiterate: I think this is a bad idea.
1. It would have to be HDFS-specific (ie. not a change to FileSystem or the
newer Files).
2. A distcp dependence on HDFS is problematic.
So to make use of this functionality, distcp would need to break the
abstraction of FileSystem.
On the other hand, an extension to the FileSystem interface that supports
modification of HDFS files would solve the need and not cause this damage...
*smile*
> Support for concatenating of files into a single file
> -----------------------------------------------------
>
> Key: HDFS-222
> URL: https://issues.apache.org/jira/browse/HDFS-222
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Venkatesh S
>
> An API to concatenate files of same size and replication factor on HDFS into
> a single larger file.
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