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Date: Mon, 13 Apr 2009 09:09:14 -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=12698420#action_12698420 ] 

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

argh, you bit me here - I planned to do so myself :)
for some reason their OutputStream has the file headers commented out with a comment saying "this is added by the caller", however their InputStream reads them ... strange. Anyway, once that's fixed and we upgrade to a proper jar, the unit test I am working on now will fail, and it will remind us to remove writing the headers in WriteLineDocTask.

Mike - I am working on the unit test as well as defaulting by extension. I hope a patch will be available sometime later today.

> 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, commons-compress-dev20090413.jar, LUCENE-1591.patch, 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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