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Posted to dev@lucene.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2018/02/15 14:24:00 UTC

[jira] [Commented] (LUCENE-8135) Implement Block-Max WAND

    [ https://issues.apache.org/jira/browse/LUCENE-8135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16365610#comment-16365610 ] 

ASF subversion and git services commented on LUCENE-8135:
---------------------------------------------------------

Commit 4fb7e3d02c6354cf1a1dce522e652610f95bec24 in lucene-solr's branch refs/heads/master from [~jpountz]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=4fb7e3d ]

LUCENE-8135: Implement block-max WAND.


> Implement Block-Max WAND
> ------------------------
>
>                 Key: LUCENE-8135
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8135
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-8135.patch
>
>
> This issue is about building on top of LUCENE-4198 in order to leverage block maximum scores instead of global maximum scores. This is documented in "Faster Top-k Document Retrieval Using Block-Max Indexes" ([http://engineering.nyu.edu/~suel/papers/bmw.pdf)|http://engineering.nyu.edu/~suel/papers/bmw.pdf] and called BMW (Block-Max WAND).
>  
> Using block max scores adds overhead to scorers, but also provides better upper bounds of the scores and is expected to remain efficient in presence of outliers (LUCENE-8087).



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