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https://issues.apache.org/jira/browse/LUCENE-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13289296#comment-13289296
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Michael McCandless commented on LUCENE-3892:
--------------------------------------------
Hi Billy,
bq. Can I get it from a wiki dump instead?
You can download it at
http://people.apache.org/~mikemccand/enwiki-20120502-lines-1k.txt.lzma
That's ~6.3 GB (compressed) and 28.7 GB (decompressed); it's the 2012/05/02
Wikipedia en export, filtered to plain text and then broken into 33.3 M ~1 KB
sized docs. I can help you get the luceneutil env set up...
{quote}
bq. Indexing time is ~18% slower than Lucene40PostingsFormat (1071 sec vs 1261
sec).
Yes, it is expected, actually it scans every block 33 times to estimate
metadata such as numFrameBits and numExceptions.
{quote}
OK, in that case I'm surprised it's only ~18% slower!
> Add a useful intblock postings format (eg, FOR, PFOR, PFORDelta,
> Simple9/16/64, etc.)
> -------------------------------------------------------------------------------------
>
> Key: LUCENE-3892
> URL: https://issues.apache.org/jira/browse/LUCENE-3892
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Michael McCandless
> Labels: gsoc2012, lucene-gsoc-12
> Fix For: 4.1
>
> Attachments: LUCENE-3892_pfor.patch, LUCENE-3892_pfor.patch,
> LUCENE-3892_settings.patch, LUCENE-3892_settings.patch
>
>
> On the flex branch we explored a number of possible intblock
> encodings, but for whatever reason never brought them to completion.
> There are still a number of issues opened with patches in different
> states.
> Initial results (based on prototype) were excellent (see
> http://blog.mikemccandless.com/2010/08/lucene-performance-with-pfordelta-codec.html
> ).
> I think this would make a good GSoC project.
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