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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12794) Support additional compression levels for GzipCodec
Date Fri, 19 Feb 2016 22:27:18 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Junping Du updated HADOOP-12794:
--------------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 2.7.3
                   2.8.0
           Status: Resolved  (was: Patch Available)

I have commit the patch to trunk, branch-2. branch-2.7 and branch-2.8. Thanks [~rmutyala]
for the contribution!

> Support additional compression levels for GzipCodec
> ---------------------------------------------------
>
>                 Key: HADOOP-12794
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12794
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 2.7.2
>            Reporter: Ravi Mutyala
>            Assignee: Ravi Mutyala
>             Fix For: 2.8.0, 2.7.3
>
>         Attachments: HADOOP-12794.0001.patch, HADOOP-12794.0002.patch, HADOOP-12794.0003.patch
>
>
> gzip supports compression levels 1-9. Compression level 4 seems to give best compression
per CPU time in some of our tests. Right now ZlibCompressor that is used by GzipCodec only
supports levels 1,9 and six (default). 
> Adding all the compression levels that are supported by native ZlibCompressor
> can provide more options to tweak compression levels. 



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