Thank you very much Erick! 1. I used boost in search, but I don't know exactly what's the best way to boost, for such as Sports 0.8, golf 0.5 in my example, would it be sports^0.8 AND golf^0.5 ?
2. I cannot use boost in indexing. Because the weight of the value changes, not the field, look at this example again, C1: fruit 0.8, apple 0.4, banana 0.2 C2: music 0.9, pop song 0.6, Britney Spears 0.4 There is no good way to boost it during indexing. Thanks. JB -----Original Message----- From: Erick Erickson [mailto:erickerick...@gmail.com] Sent: Wednesday, March 03, 2010 5:45 PM To: solr-user@lucene.apache.org Subject: Re: weighted search and index You have to provide some more details to get meaningful help. You say "I was trying to use boosting". How? At index time? Search time? Both? Can you provide some code snippets? What does your schema look like for the relevant field(s)? You say "but seems not working right". What does that mean? No hits? Hits not ordered as you expect? Have you tried putting "&debugQuery=on" on your URL and examined the return values? Have you looked at your index with the admin page and/or Luke to see if the data in the index is as you expect? As far as I know, boosts are multiplicative. So boosting by a value less than 1 will actually decrease the ranking. But see the Lucene scoring, See: http://lucene.apache.org/java/2_4_0/api/org/apache/lucene/search/Similarity. html And remember, that boosting will *tend* to move a hit up or down in the ranking, not position it absolutely. HTH Erick On Wed, Mar 3, 2010 at 8:13 PM, Jianbin Dai <j...@huawei.com> wrote: > Hi, > > I am trying to use solr for a content match application. > > A content is described by a set of keywords with weights associated, eg., > > C1: fruit 0.8, apple 0.4, banana 0.2 > C2: music 0.9, pop song 0.6, Britney Spears 0.4 > > Those contents would be indexed in solr. > In the search, I also have a set of keywords with weights: > > Query: Sports 0.8, golf 0.5 > > I am trying to find the closest matching contents for this query. > > My question is how to index the contents with weighted scores, and how to > write search query. I was trying to use boosting, but seems not working > right. > > Thanks. > > Jianbin > > >
