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Date: Sun, 12 Apr 2009 20:36:14 -0700 (PDT)
From: "Shai Erera (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-1591) Enable bzip compression in
 benchmark
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    [ https://issues.apache.org/jira/browse/LUCENE-1591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12698314#action_12698314 ] 

Shai Erera commented on LUCENE-1591:
------------------------------------

BTW, the enhancements to EnwikiDocMaker yielded another 2% improvement to the process of converting the enwiki file to a one-line file. Just a FYI.
I basically wait with 1595 (refactoring to benchmark) until this one is committed, so the sooner the better ;)

> Enable bzip compression in benchmark
> ------------------------------------
>
>                 Key: LUCENE-1591
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1591
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/benchmark
>            Reporter: Shai Erera
>             Fix For: 2.9
>
>         Attachments: ant-1.7.1.jar, LUCENE-1591.patch, LUCENE-1591.patch
>
>
> bzip compression can aid the benchmark package by not requiring extracting bzip files (such as enwiki) in order to index them. The plan is to add a config parameter bzip.compression=true/false and in the relevant tasks either decompress the input file or compress the output file using the bzip streams.
> It will add a dependency on ant.jar which contains two classes similar to GZIPOutputStream and GZIPInputStream which compress/decompress files using the bzip algorithm.
> bzip is known to be superior in its compression performance to the gzip algorithm (~20% better compression), although it does the compression/decompression a bit slower.
> I wil post a patch which adds this parameter and implement it in LineDocMaker, EnwikiDocMaker and WriteLineDoc task. Maybe even add the capability to DocMaker or some of the super classes, so it can be inherited by all sub-classes.

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