[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'

["Owen O'Malley (JIRA)" <ji...@apache.org>]

    [ http://issues.apache.org/jira/browse/HADOOP-538?page=comments#action_12446163 ] 
            
Owen O'Malley commented on HADOOP-538:
--------------------------------------

If I apply this patch:

ant clean tar fails with:

BUILD FAILED
/home/oom/work/clean-hadoop/build.xml:456: /home/oom/work/clean-hadoop/build/hadoop-0.7.3-dev/lib/native not found.

It also has a conflict with the mainline over one of the javadoc comments. 

It also causes a new warning from javadoc, which needs to be fixed.

> 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: 0.8.0
>
>         Attachments: HADOOP-538.patch, HADOOP-538_20061005.tgz, HADOOP-538_20061011.tgz, HADOOP-538_20061026.tgz, HADOOP-538_20061030.tgz, 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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