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https://issues.apache.org/jira/browse/HADOOP-5999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12717845#action_12717845
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Owen O'Malley commented on HADOOP-5999:
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I don't think this is a good feature to expose. It has the unfortunate
characteristic that it will perform very badly on most file systems and even in
some non-trivial cases of HDFS. Take for instance the case where the files have
different replication factors or block sizes.
> Support for concatenating of files into a single file
> -----------------------------------------------------
>
> Key: HADOOP-5999
> URL: https://issues.apache.org/jira/browse/HADOOP-5999
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> 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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