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https://issues.apache.org/jira/browse/HADOOP-12794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15371784#comment-15371784
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Vinod Kumar Vavilapalli commented on HADOOP-12794:
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Even though this landed in 2.7.3, the commit missed the JIRA number. So, the
ticket & commit are disconnected. Here's the SHA, for posterity.
{code}
commit 78a4c348940cd98548650c0a5adb981895cef201
Author: Junping Du <[email protected]>
Date: Fri Feb 19 14:21:25 2016 -0800
Support additional compression levels for GzipCodec. Contributed by Ravi
Mutyala.
(cherry picked from commit 18f9b77a321b225677ce23c503b41d21478fc4a7)
(cherry picked from commit e38c2ef6c54521a74cc2b787d78211f629aa07d8)
{code}
> 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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