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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3892) Add a useful intblock postings format (eg, FOR, PFOR, PFORDelta, Simple9/16/64, etc.)
Date Mon, 30 Jul 2012 22:20:35 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13425313#comment-13425313
] 

Michael McCandless commented on LUCENE-3892:
--------------------------------------------

Sorry I meant to say: the BlockPacked PF is from Billy's LUCENE-3892-blockFor&packedecoder(comp).patch.
                
> 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 - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>              Labels: gsoc2012, lucene-gsoc-12
>             Fix For: 4.1
>
>         Attachments: LUCENE-3892-BlockTermScorer.patch, LUCENE-3892-blockFor&hardcode(base).patch,
LUCENE-3892-blockFor&packedecoder(comp).patch, LUCENE-3892-blockFor-with-packedints-decoder.patch,
LUCENE-3892-blockFor-with-packedints-decoder.patch, LUCENE-3892-blockFor-with-packedints.patch,
LUCENE-3892-direct-IntBuffer.patch, LUCENE-3892-for&pfor-with-javadoc.patch, LUCENE-3892-handle_open_files.patch,
LUCENE-3892-pfor-compress-iterate-numbits.patch, LUCENE-3892-pfor-compress-slow-estimate.patch,
LUCENE-3892_for_byte[].patch, LUCENE-3892_for_int[].patch, LUCENE-3892_for_unfold_method.patch,
LUCENE-3892_pfor_unfold_method.patch, LUCENE-3892_pulsing_support.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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