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From Daniel Naber <lucenelist2...@danielnaber.de>
Subject Re: How are results merged from a multisearcher?
Date Thu, 18 May 2006 20:50:40 GMT
On Donnerstag 18 Mai 2006 18:36, Ken Krugler wrote:

> >Could someone describe how the results from multiple indices are merged
> > when using a MultiSearcher? My naive intuition is that the scores for
> > documents found in each index could be wildly different, so what
> > criteria is used to merge the scored docs?
>
> I believe they are blindly merged.
>
> Which means that the IDFs for terms between multiple indices must be
> relatively equal, otherwise the results will be skewed.

That was the case in Lucene <= 1.4, in 1.9 it should be fixed, i.e. merging 
is supposed to work correctly.

Regards
 Daniel

-- 
http://www.danielnaber.de

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