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From "Shai Erera (JIRA)" <>
Subject [jira] Commented: (LUCENE-1591) Enable bzip compression in benchmark
Date Sun, 12 Apr 2009 15:12:14 GMT


Shai Erera commented on LUCENE-1591:

bq. But, implement close() to actually close the stream?

Already did, I had to because otherwise the bzip file wasn't sealed properly (that's why I
started the other thread about tracking task resources). It already exists in the attached

I'm finishing a run with the updated code (wrapping w/ BOS), so once that finishes, I'll post
an updated patch and some numbers.

> Enable bzip compression in benchmark
> ------------------------------------
>                 Key: LUCENE-1591
>                 URL:
>             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
> 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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