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From "Dawid Weiss (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-538) Implement a nio's 'direct buffer' based wrapper over zlib to improve performance of java.util.zip.{De|In}flater as a 'custom codec'
Date Wed, 27 Sep 2006 19:50:51 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-538?page=comments#action_12438205 ] 
            
Dawid Weiss commented on HADOOP-538:
------------------------------------

Don't know if it's at all relevant, but if you must stick to pure Java and still want to avoid
SUN's buggy compression streams, we have an implementation of inflater/deflater and GZIP wrappers
on top of jzlib. It works just fine for us (although is about 50% slower compared to the JDK
version, which, although buggy, has certain native implementations).

http://svn.sourceforge.net/viewvc/carrot2/trunk/carrot2/components/carrot2-util-gzip/

Dawid


> Implement a nio's 'direct buffer' based wrapper over zlib to improve performance of java.util.zip.{De|In}flater
as a 'custom codec'
> -----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-538
>                 URL: http://issues.apache.org/jira/browse/HADOOP-538
>             Project: Hadoop
>          Issue Type: Improvement
>    Affects Versions: 0.6.1
>            Reporter: Arun C Murthy
>         Assigned To: Arun C Murthy
>             Fix For: 0.7.0
>
>         Attachments: HADOOP-538.patch, HADOOP-538_benchmarks.tgz
>
>
> There has been more than one instance where java.util.zip's {De|In}flater classes perform
unreliably, a simple wrapper over zlib-1.2.3 (latest stable) using java.nio.ByteBuffer (i.e.
direct buffers) should go a long way in alleviating these woes.

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