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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (PIG-42) Pig should be able to split Gzip files like it can split Bzip files
Date Fri, 30 Apr 2010 00:44:54 GMT

     [ https://issues.apache.org/jira/browse/PIG-42?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Olga Natkovich resolved PIG-42.
-------------------------------

    Resolution: Won't Fix

Pig no longer deal with compression. It is now up to individual loaders/storers to do this

> 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
>            Assignee: 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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