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https://issues.apache.org/jira/browse/HADOOP-7206?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alejandro Abdelnur updated HADOOP-7206:
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Attachment: HADOOP-7206revertplusnew.patch
Attached is a patch based on Issay's patch.
* It reverts the current committed HADOOP-7206 & HADDOP-7407
* It uses Snappy native directly
* It adds the JNI bindings to Hadoop native
* Via {{configure.ac}}, if snappy is not available it ignores Snappy JNI
bindings
* Snappy lib is looked (by default) at {{/usr/local}}
* Once Snappy is avail by default in different OSes, the default lookup can be
changed to {{/usr/}} for automatic detection
* Location of Snappy lib can be altered with {{-Dsnappy.prefix=}} Ant option
* SnappyCodec is defined in {{core-default.xml}}
* If the Snappy JNI bindings and/or Snappy are not present, SnappyCodec warns
and continues
IMO this addresses the concerns previously discussed in the JIRA. And it will
not break the build in Apache Jenkins machines if Snappy is not install.
> 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
> Fix For: 0.23.0
>
> Attachments: HADOOP-7206-002.patch, HADOOP-7206.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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