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https://issues.apache.org/jira/browse/HDFS-4256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13508341#comment-13508341
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Suresh Srinivas commented on HDFS-4256:
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bq. I didn't call out on this (stability aspect?). Unsure why you're exclaiming
it, thats all
Exclamation was to indicate that this a very old change and not the stability
aspect.
bq. We have a release out there we aren't yet encouraging adoption upon, which
has all this in it already.
Not sure I understand. In case you are talking about 0.21, you know the status
of that as well as 0.22.
bq. are we also intending to do the DistCp optimizations that can benefit from
this, i.e. MAPREDUCE-2117 and MAPREDUCE-2557, so that there's also an internal
use of this, out of the box
Right now I was planning to. I encourage you to port it to 1.0, if you think
the users benefit from it.
> Support for concatenation of files into a single file in branch-1
> -----------------------------------------------------------------
>
> Key: HDFS-4256
> URL: https://issues.apache.org/jira/browse/HDFS-4256
> Project: Hadoop HDFS
> Issue Type: Test
> Components: namenode
> Affects Versions: 1.2.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
>
> HDFS-222 added support concatenation of multiple files in a directory into a
> single file. This helps several use cases where writes can be parallelized
> and several folks have expressed in this functionality.
> This jira intends to make changes equivalent from HDFS-222 into branch-1 to
> be made available release 1.2.0.
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