[jira] Commented: (PIG-42) Pig should be able to split Gzip files like it can split Bzip files

["Olga Natkovich (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-42?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12557089#action_12557089 ] 

Olga Natkovich commented on PIG-42:
-----------------------------------

Looks like hadoop guys might do it soon: https://issues.apache.org/jira/browse/HADOOP-1824

> 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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