lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jim Ferenczi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-8788) Order LeafReaderContexts by Estimated Number Of Hits
Date Fri, 24 May 2019 10:34:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-8788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16847455#comment-16847455
] 

Jim Ferenczi commented on LUCENE-8788:
--------------------------------------

{quote}

I like the idea [~jim.ferenczi] proposed. I can open a Jira for that and work on a patch
for it as well, unless Jim wants to do it himself?

{quote}

Something is needed for the search side and this issue is the right place to add such functionalities.
I wonder if we need an issue for the merge side though since it's already possible to change
the order of segments in a custom FilterMergePolicy. I tried to do it in a POC and the change
is trivial so I am not sure that we need to do anything in core.

> Order LeafReaderContexts by Estimated Number Of Hits
> ----------------------------------------------------
>
>                 Key: LUCENE-8788
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8788
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Atri Sharma
>            Priority: Major
>
> We offer no guarantee on the order in which an IndexSearcher will look at segments during
a search operation. This can be improved for use cases where an engine using Lucene invokes
early termination and uses the partially collected hits. A better model would be if we sorted
segments by the estimated number of hits, thus increasing the probability of the overall relevance
of the returned partial results.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message