OK, but what does "merged correctly" mean? That is really the crux of my question: what is the merging semantics across indices with possibly divergent IDFs.
On 5/18/06, Daniel Naber <[EMAIL PROTECTED]> wrote:
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 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
-- Tom Emerson [EMAIL PROTECTED] http://www.dreamersrealm.net/~tree
