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From "David Smiley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-6819) Deprecate index-time boosts?
Date Thu, 16 Feb 2017 17:03:41 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-6819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15870286#comment-15870286
] 

David Smiley commented on LUCENE-6819:
--------------------------------------

Index time boosts are valuable.  I've found that tuning index time boosts is the easiest way
to boost documents that has the most predictable effect, relative to query time boosts.  Of
course it's inflexible but it's a trade-off.

> Deprecate index-time boosts?
> ----------------------------
>
>                 Key: LUCENE-6819
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6819
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Adrien Grand
>            Priority: Minor
>
> Follow-up of this comment: https://issues.apache.org/jira/browse/LUCENE-6818?focusedCommentId=14934801&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14934801
> Index-time boosts are a very expert feature whose behaviour is tight to the Similarity
impl. Additionally users have often be confused by the poor precision due to the fact that
we encode values on a single byte. But now we have doc values that allow you to encode any
values the way you want with as much precision as you need so maybe we should deprecate index-time
boosts and recommend to encode index-time scoring factors into doc values fields instead.



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