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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7206) Integrate Snappy compression
Date Fri, 24 Jun 2011 18:23:49 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054609#comment-13054609
] 

Hadoop QA commented on HADOOP-7206:
-----------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12483753/HADOOP-7206new.patch
  against trunk revision 1139387.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 system test framework.  The patch passed system test framework compile.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/670//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HADOOP-Build/670//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/670//console

This message is automatically generated.

> 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
>            Assignee: Alejandro Abdelnur
>         Attachments: HADOOP-7206-002.patch, HADOOP-7206.patch, HADOOP-7206new.patch,
HADOOP-7206revertplusnew-b.patch, HADOOP-7206revertplusnew.patch, v2-HADOOP-7206-snappy-codec-using-snappy-java.txt,
v3-HADOOP-7206-snappy-codec-using-snappy-java.txt, v4-HADOOP-7206-snappy-codec-using-snappy-java.txt,
v5-HADOOP-7206-snappy-codec-using-snappy-java.txt
>
>
> 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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