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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2018/01/23 16:58:00 UTC

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

     [ https://issues.apache.org/jira/browse/LUCENE-8135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adrien Grand updated LUCENE-8135:
---------------------------------
    Attachment: LUCENE-8135.patch

> 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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