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From Ole-Martin Mørk <olemar...@gmail.com>
Subject Re: Help understanding fieldNorm
Date Mon, 05 Oct 2009 12:14:37 GMT
That might be true. The document boost did not change, but maybe the field
boost changed. Is it possible to retrieve the field boost from solr?
--
Ole-Martin Mørk


On Mon, Oct 5, 2009 at 2:01 PM, Simon Willnauer <
simon.willnauer@googlemail.com> wrote:

> I still guess that the document has been indexed with different boost
> factors the first time if you did not change the length of the URL.
> Can you make sure this did not happen?
>
> simon
>
> On Mon, Oct 5, 2009 at 12:45 PM, Ole-Martin Mørk <olemartin@gmail.com
> >wrote:
>
> > I did not change the url. The length of the title was increased by 1,
> from
> > 41 to 42 characters.
> > --
> > Ole-Martin Mørk
> >
> >
> > On Mon, Oct 5, 2009 at 12:39 PM, Karl Wettin <karl.wettin@gmail.com>
> > wrote:
> >
> > > sorry, I ment title.
> > >
> > > 5 okt 2009 kl. 11.57 skrev Simon Willnauer:
> > >
> > >
> > >  Ole-Martin, did you mention that you did not change the URL value but
> > the
> > >> title?
> > >>
> > >> simon
> > >>
> > >> On Mon, Oct 5, 2009 at 11:52 AM, Karl Wettin <karl.wettin@gmail.com>
> > >> wrote:
> > >>
> > >>  Hi Ole-Martin,
> > >>>
> > >>> how many characters was it in the url in before and after update?
> > >>>
> > >>>
> > >>>   karl
> > >>>
> > >>> 5 okt 2009 kl. 10.21 skrev Ole-Martin Mørk:
> > >>>
> > >>>
> > >>> Hi. I am trying to understand Lucene's scoring algorithm. We're
> > >>>
> > >>>> getting some strange results. First we search for a given page
by
> it's
> > >>>> url. We get this result:
> > >>>>
> > >>>> 0.0014793393 = fieldWeight(url:"our super secret url" in 22),
> product
> > >>>> of:
> > >>>> 1.0 = tf(phraseFreq=1.0)
> > >>>> 32.31666 = idf(url: www=7327 host=321 com=7327 article=2456
> > >>>> something=2 something=44 704290075=1)
> > >>>> 4.5776367E-5 = fieldNorm(field=url, doc=22)
> > >>>>
> > >>>> When this is done, we use solrJ to read and write the document.
The
> > >>>> only change is the title of the document (appends the number 2)
> > >>>>
> > >>>> We search again and the fieldNorm is changed significantly:
> > >>>>
> > >>>> 9.874598 = fieldWeight(url:"our super secret url" in 0), product
of:
> > >>>> 1.0 = tf(phraseFreq=1.0)
> > >>>> 31.598713 = idf(url: www=7328 host=322 com=7328 article=2457
> > >>>> something=3 somthing=45 704290075=2)
> > >>>> 0.3125 = fieldNorm(field=url, doc=0)
> > >>>>
> > >>>> Why does the value of fieldNorm change so much?
> > >>>>
> > >>>> Looking forward to your answers.
> > >>>>
> > >>>> --
> > >>>> Ole-Martin Mørk
> > >>>> http://twitter.com/olemartin
> > >>>> http://flickr.com/olemartin
> > >>>>
> > >>>>
> > >>>
> > >>> ---------------------------------------------------------------------
> > >>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> > >>> For additional commands, e-mail: java-user-help@lucene.apache.org
> > >>>
> > >>>
> > >>>
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> > > For additional commands, e-mail: java-user-help@lucene.apache.org
> > >
> > >
> >
>

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