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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12794) Support additional compression levels for GzipCodec
Date Thu, 18 Feb 2016 09:42:18 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15152024#comment-15152024
] 

Junping Du commented on HADOOP-12794:
-------------------------------------

Latest patch LGTM. +1. Will commit it shortly.

> 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
>         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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