hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Updated: (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, 11 Oct 2006 19:24:37 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-538?page=all ]

Arun C Murthy updated HADOOP-538:
---------------------------------

    Attachment: HADOOP-538_20061011.tgz

Here's another patch incorporating all features listed here: http://issues.apache.org/jira/browse/HADOOP-538#action_12439996
with a few additions:
* org.apache.hadoop.io.compress.zlib.{Com|Decom}pressor classes can now encode/decode both
zlib and gzip formats. This is used in GzipCodec now.
* I have added a switch: 'hadoop.native.library' in hadoop-default.xml to let users control
whether or not they wish to use the native code.
* Fixed an issue with autom4te which generated autom4te.cache in src/native

Doug - could you please copy the attached libhadoop-linux-i386.so in trunk/lib/native first
before attempting to build native-hadoop? It will need to be committed also... thanks!

> 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_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.

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message