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https://issues.apache.org/jira/browse/MAPREDUCE-469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879090#action_12879090
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Greg Roelofs commented on MAPREDUCE-469:
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Ciemo,
On Yahoo grids it will be (via site config). For the default code as used
by everyone else, I'm open to input. I tend to be conservative when it
comes to things that could be interpreted as user-visible API changes, but
if everyone agrees that the old behavior is simply a bug, I'm happy to drop
the config option and just hardcode concatenation support. Or I can leave
it configurable but make the concat support the default.
I'll send an e-mail to mapreduce-user and see what others think.
> Support concatenated gzip and bzip2 files
> -----------------------------------------
>
> Key: MAPREDUCE-469
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-469
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Tom White
> Assignee: Greg Roelofs
> Attachments: grr-hadoop-common.dif.20100614c,
> grr-hadoop-mapreduce.dif.20100614c
>
>
> When running MapReduce with concatenated gzip files as input only the first
> part is read, which is confusing, to say the least. Concatenated gzip is
> described in http://www.gnu.org/software/gzip/manual/gzip.html#Advanced-usage
> and in http://www.ietf.org/rfc/rfc1952.txt. (See original report at
> http://www.nabble.com/Problem-with-Hadoop-and-concatenated-gzip-files-to21383097.html)
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