On Mon, Apr 2, 2012 at 5:33 PM, Michael McCandless <luc...@mikemccandless.com> wrote: > Hmm that's odd. > > If the scores were identical I'd expect different sort order, since we > tie-break by internal docID. > > But if the scores are different... the insertion order shouldn't > matter. And, the score should not change as a function of insertion > order...
Well, I assumed that TF-IDF would wiggle. > > Do you have a small test case? SInce this surprises you, I will build a test case. > > Mike McCandless > > http://blog.mikemccandless.com > > On Mon, Apr 2, 2012 at 5:28 PM, Benson Margulies <bimargul...@gmail.com> > wrote: >> We've observed something that, in some ways, is not surprising. >> >> If you take a set of documents that are close in 'score' to some query, >> >> and shuffle them in different orders >> >> and then see what results you get in what order from the reference query, >> >> the scores will vary according to the insertion order. >> >> I can't see any way to argue that it's wrong, but we find it >> inconvenient when we are testing something and we want to multithread >> the test to speed it up, thus making the insertion order >> nondeterministic. >> >> It occurred to me that perhaps you all have some similar concerns in >> testing lucene itself, and might have some advice about how to get >> around it, thus this email. >> >> We currently observe this with 2.9.1 and 3.5.0. >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >> For additional commands, e-mail: java-user-h...@lucene.apache.org >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
