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From "issei yoshida (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7206) Integrate Snappy compression
Date Fri, 13 May 2011 09:48:49 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032929#comment-13032929
] 

issei yoshida commented on HADOOP-7206:
---------------------------------------

Hi all,

Thank you for giving permission to relisence regarding hadoop-snappy.

I created the patch that add the snappy compression support to the trunk of the Hadoop SVN
repository.

Its native library is a part of the libhadoop and it requires the snappy v1.0.2 or higher.
(Because it doesn't use C++ interface but C interface and load the snappy native library dynamically
via dlopen.)

I would like to hear your advice.

> Integrate Snappy compression
> ----------------------------
>
>                 Key: HADOOP-7206
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7206
>             Project: Hadoop Common
>          Issue Type: New Feature
>    Affects Versions: 0.21.0
>            Reporter: Eli Collins
>         Attachments: HADOOP-7206.patch
>
>
> Google release Zippy as an open source (APLv2) project called Snappy (http://code.google.com/p/snappy).
This tracks integrating it into Hadoop.
> {quote}
> Snappy is a compression/decompression library. It does not aim for maximum compression,
or compatibility with any other compression library; instead, it aims for very high speeds
and reasonable compression. For instance, compared to the fastest mode of zlib, Snappy is
an order of magnitude faster for most inputs, but the resulting compressed files are anywhere
from 20% to 100% bigger. On a single core of a Core i7 processor in 64-bit mode, Snappy compresses
at about 250 MB/sec or more and decompresses at about 500 MB/sec or more.
> {quote}

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