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From "Shai Erera (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-1591) Enable bzip compression in benchmark
Date Thu, 16 Apr 2009 03:16:15 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Shai Erera updated LUCENE-1591:
-------------------------------

    Attachment: LUCENE-1591.patch

I removed this test from WriteLineDocTaskTest, since it doesn't really belong there. It tested
that if WLDT created a bz2 file, an attempt to read it as regular would fail. But reading
is not part of WLDT's logic, and that test case belongs (and already exists) in LDM test.

I'm tempted to say "this patch should be fine", but given the history of this issue and the
OS weird-ness I'm being careful :)

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