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https://issues.apache.org/jira/browse/HDFS-222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12746379#action_12746379
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Robert Chansler commented on HDFS-222:
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The present preferred option is to do something like _venkat(F1, F2)_ moves the
blocks of F2 to F1, leaving F2 empty. This will be allowed only if the block
sizes of F1 and F2 are the same, and F1 is an integral number of full blocks.
This would be an HDFS special, and not generally implemented for other file
systems where block manipulation is (un-)ill-defined.
> 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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