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https://issues.apache.org/jira/browse/PIG-42?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12549337
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Owen O'Malley commented on PIG-42:
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It seems a lot more friendly to define the format like:
{code}
% touch empty
% gzip -nc part0 empty part1 empty part2 empty part3 > big.sgz
{code}
That would let the user do:
{code}
% gzcat big.sgz
{code}
to get their file back. I'd also use filenames rather than a header to reflect
whether a file is in this format, but that is mostly just a personal preference.
> Pig should be able to split Gzip files like it can split Bzip files
> -------------------------------------------------------------------
>
> Key: PIG-42
> URL: https://issues.apache.org/jira/browse/PIG-42
> Project: Pig
> Issue Type: Improvement
> Components: impl
> Reporter: Benjamin Reed
> Attachments: gzip.patch
>
>
> It would be nice to be able to split gzip files like we can split bzip files.
> Unfortunately, we don't have a sync point for the split in the gzip format.
> Gzip file format supports the notion of concatenate gzipped files. When
> gzipped files are concatenated together they are treated as a single file. So
> to make a gzipped file splittable we can used an empty compressed file with
> some salt in the headers as a sync signature. Then we can make the gzip file
> splittable by using this sync signature between compressed segments of the
> file.
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