Hi Otis, I tried this. It doesn't seem to solve my problem, though. I think it's best used to make small adjustment when relevance scores are similar. In my case, if I want to rank the most recent documents first (because it's about news), I have to use very large boost, which will end up getting the docs that are not so relevant to the top. I haven't been able to get desired results of showing only recent documents with decent relevance scores.
Ideally, I think it can be solved by doing a query for the past 24 hours and keeping the docs with best relevance scores, then another query for the previous 24 hours ... but this really isn't very efficient. Maybe OK for news because I may need to serve for up to 7 days. Still, 7 solr queries for a front-end query doesn't sound ideal. So I'm still in search for a better way ... Thanks, Jack On Tue, May 13, 2008 at 9:06 PM, Otis Gospodnetic <[EMAIL PROTECTED]> wrote: > The answer is: function queries! :) > You can easily use function queries with DisMaxRequestHandler. For example, > this is what you can add to the dismax config section in solrconfig.xml: > > <str name="bf"> > recip(rord(addDate),1,1000,1000)^2.5 > </str> > > Assuming you have an addDate field, this will give fresher document some > boost. Look for this on the Wiki, it's all there. > > Otis
