I'm not sure you can. very short fields aren't differentiated on the basis of field length due to rounding errors. Here's a cut-n-paste from Jay Hill:
******************************** So the values are not pre-set for the lengthNorm, but for some counts the fieldLength value winds up being the same because of the precision los. Here is a list of lengthNorm values for 1 to 10 term fields: # of terms lengthNorm 1 1.0 2 .625 3 .5 4 .5 5 .4375 6 .375 7 .375 8 .3125 9 .3125 10 .3125 **************** I'd ask, though, if this behavior is "good enough", are your users well served by spending time on this case? Best Erick On Tue, May 3, 2011 at 7:48 AM, roySolr <royrutten1...@gmail.com> wrote: > Hello, > > I have a question about scoring when i use the dismax handler. I will give > some examples: > > name category related > category > 1. Chelsea best club ever Chelsea Sport > 2. Chelsea Chelsea > Sport > > When i search for "Chelsea" i want a higher score for number 2. I think it > is a better match on fieldlength. > I use the dismax and both records has the same score. I see some difference > in fieldNorm both still the score is the same. How can i fix this? > > > my config: > > <requestHandler name="dismax" class="solr.SearchHandler" default="true"> > <lst name="defaults"> > <str name="defType">dismax</str> > <str name="qf"> > name category related_category > </str> > </lst> > <str name="tie">1.0</str> > </requestHandler> > > SCORE 1: > 0.75269306 = (MATCH) sum of: > 0.75269306 = (MATCH) max of: > 0.75269306 = (MATCH) weight(category:chelsea in 680), product of: > 0.3085193 = queryWeight(category:chelsea), product of: > 2.4396951 = idf(docFreq=236, maxDocs=1000) > 0.12645814 = queryNorm > 2.4396951 = (MATCH) fieldWeight(category:chelsea in 680), product of: > 1.0 = tf(termFreq(category:chelsea)=1) > 2.4396951 = idf(docFreq=236, maxDocs=1000) > 1.0 = fieldNorm(field=category, doc=680) > 0.37634653 = (MATCH) weight(name:chelsea in 680), product of: > 0.3085193 = queryWeight(name:chelsea), product of: > 2.4396951 = idf(docFreq=236, maxDocs=1000) > 0.12645814 = queryNorm > 1.2198476 = (MATCH) fieldWeight(name:chelsea in 680), product of: > 1.0 = tf(termFreq(name:chelsea)=1) > 2.4396951 = idf(docFreq=236, maxDocs=1000) > 0.5 = fieldNorm(field=name, doc=680) > > > SCORE 2: > 0.75269306 = (MATCH) sum of: > 0.75269306 = (MATCH) max of: > 0.75269306 = (MATCH) weight(category:chelsea in 678), product of: > 0.3085193 = queryWeight(category:chelsea), product of: > 2.4396951 = idf(docFreq=236, maxDocs=1000) > 0.12645814 = queryNorm > 2.4396951 = (MATCH) fieldWeight(category:chelsea in 678), product of: > 1.0 = tf(termFreq(category:chelsea)=1) > 2.4396951 = idf(docFreq=236, maxDocs=1000) > 1.0 = fieldNorm(field=category, doc=678) > 0.75269306 = (MATCH) weight(name:chelsea in 678), product of: > 0.3085193 = queryWeight(name:chelsea), product of: > 2.4396951 = idf(docFreq=236, maxDocs=1000) > 0.12645814 = queryNorm > 2.4396951 = (MATCH) fieldWeight(name:chelsea in 678), product of: > 1.0 = tf(termFreq(name:chelsea)=1) > 2.4396951 = idf(docFreq=236, maxDocs=1000) > 1.0 = fieldNorm(field=name, doc=678) > > > > > > -- > View this message in context: > http://lucene.472066.n3.nabble.com/Dismax-scoring-multiple-fields-TIE-tp2893923p2893923.html > Sent from the Solr - User mailing list archive at Nabble.com. >
