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From "Arun C Murthy (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 Mon, 13 Nov 2006 10:17:39 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-538?page=comments#action_12449297 ] 
            
Arun C Murthy commented on HADOOP-538:
--------------------------------------

Doug,
> 1. There's some debug output in bin/hadoop, an 'echo'. 
Newer patch forthcoming to fix this oversight...

> The patch should not include binaries: these should be built somehow by build.xml. 
I have attached the .so for linux built via 'ant compile-native'... we will need to check
this in for people who don't want to install the C compilation environment as we had discussed
previously. Am I missing something here?

> On second thought, the custom libs should probably go in build/native and the prebuilt
in lib/native.
Just to clarify: you'd want the 'custom built' libhadoop.so to override the 'prebuilt' one
in lib/native on 'ant package' ?

> 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
>          Components: io
>    Affects Versions: 0.6.1
>            Reporter: Arun C Murthy
>         Assigned To: Arun C Murthy
>             Fix For: 0.9.0
>
>         Attachments: HADOOP-538.patch, HADOOP-538_20061005.tgz, HADOOP-538_20061011.tgz,
HADOOP-538_20061026.tgz, HADOOP-538_20061030.tgz, HADOOP-538_20061107.tgz, HADOOP-538_20061108.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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