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From "Mr Bsd (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7657) Add support for LZ4 compression
Date Fri, 16 Dec 2011 17:38:32 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13171090#comment-13171090
] 

Mr Bsd commented on HADOOP-7657:
--------------------------------

Thanks Chang.
Your patch gets excellent results. This is even better than expected.
Here are some figures from a test system :

FP.LOG :
ZLIB: [b 1M] bytes 20617071 -> 1451989 07.1% comp 55.3 MB/s uncomp 355.0 MB/s
LZ4: [b 1M] bytes 20617071 -> 2412432 11.7% comp 859.9 MB/s uncomp 1874.9 MB/s
SNAPPY: [b 4M] bytes 20617071 -> 3033623 14.7% comp 606.6 MB/s uncomp 1145.3 MB/s
                
> Add support for LZ4 compression
> -------------------------------
>
>                 Key: HADOOP-7657
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7657
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Mr Bsd
>              Labels: compression
>         Attachments: HADOOP-7657.lz4.v1.patch
>
>
> According to several benchmark sites, LZ4 seems to overtake other fast compression algorithms,
especially in the decompression speed area. The interface is also trivial to integrate (http://code.google.com/p/lz4/source/browse/trunk/lz4.h)
and there is no license issue.

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