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Posted to common-issues@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2011/01/06 23:05:48 UTC

[jira] Assigned: (HADOOP-7076) Splittable Gzip

     [ https://issues.apache.org/jira/browse/HADOOP-7076?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Doug Cutting reassigned HADOOP-7076:
------------------------------------

    Assignee: Niels Basjes

> Splittable Gzip
> ---------------
>
>                 Key: HADOOP-7076
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7076
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: io
>            Reporter: Niels Basjes
>            Assignee: Niels Basjes
>         Attachments: HADOOP-7076.patch
>
>
> Files compressed with the gzip codec are not splittable due to the nature of the codec.
> This limits the options you have scaling out when reading large gzipped input files.
> Given the fact that gunzipping a 1GiB file usually takes only 2 minutes I figured that for some use cases wasting some resources may result in a shorter job time under certain conditions.
> So reading the entire input file from the start for each split (wasting resources!!) may lead to additional scalability.

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