Hi Raj, I'm guessing your slug field is much shorter and thus a match in that field has more weight than a match is a much longer story field. If you omit norms for those fields in the schema (and reindex), I believe you will see File 4 drop to position #4.
Otis ---- Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch Lucene ecosystem search :: http://search-lucene.com/ ----- Original Message ---- > From: "Nemani, Raj" <raj.nem...@turner.com> > To: solr-user@lucene.apache.org > Sent: Mon, April 11, 2011 4:12:52 PM > Subject: Question on Dismax plugin > > All, > > I have a question on the Dismax plugin for the search handler. I have > two test instances of Solr. In one I am using the default search > handler. In this case, the fields that I am working with (slug and > story) are indexed via the all_text filed and the searches are done on > the all_text field. > > For the other one I have configured a search handler using the dismax > plugin as shown below. > > > > <requestHandler name="mydismax" class="solr.SearchHandler" > > > <lst name="defaults"> > > <str name="defType">dismax</str> > > <str name="echoParams">explicit</str> > > <float name="tie">0.01</float> > > <str name="qf"> > > story^3.0 slug^0.2 > > </str> > > <int name="ps">100</int> > > <str name="q.alt">*:*</str> > > </lst> > > </requestHandler> > > > > To make testing easier, I only have 4 (same) documents in both indexes > with the word "Obama" appearing inside as described below. > > > > File 1:: The word Obama appears zero times in "slug" field and four > times in "story" field > > File 2:: The word Obama appears zero times in "slug" field and thrice in > "story" field > > File 3:: The word Obama appears zero times in "slug" field and two times > in "story" field > > File 4:: The word Obama appears One time in "slug" field and one time in > "story" field > > > > > > Here is the order of the documents in the order of decreasing scores > from the search results > > > > Dismax Search Handler (steadily decreasing scores): > > * File 1:: The word Obama appears zero times in "slug" field and > four times in "story" field > > * File 4:: The word Obama appears One time in "slug" field and > one time in "story" field > > * File 2:: The word Obama appears zero times in "slug" field and > thrice in "story" field > > * File 3:: The word Obama appears zero times in "slug" field and > two times in "story" field > > > > Standard Search handler: > > * File 1:: The word Obama appears zero times in "slug" field and > four times in "story" field > > * File 2:: The word Obama appears zero times in "slug" field and > thrice in "story" field (same score as File 4 score below) > > * File 4:: The word Obama appears One time in "slug" field and > one time in "story" field (same score as File 2 score above) > > * File 3:: The word Obama appears zero times in "slug" field and > two times in "story" field > > > > > > My question, why is dismax showing "File 4:: The word Obama appears One > time in "slug" field and one time in "story" field" > > ahead of > > "File 2:: The word Obama appears zero times in "slug" field and thrice > in "story" field" given that I have boosted these fields as shown below. > > > > > <str name="qf"> > > story^3.0 slug^0.2 > > </str> > > > > I would have thought that the ""File 4:: The word Obama appears One time > in "slug" field and one time in "story" field" would have gone all the > way done in the result list. > > > > Any help is appreciated > > Thanks much in advance > > Raj > > > > > > > > > > > > > > > > > >
