In addition : bf=recip(ms(NOW/DAY,unixdate),3.16e-11,5,0.1)) is an additive boost. I tend to prefer multiplicative ones but that is up to you [1].
You can specify the order of magnitude of the values generated by that function. This means that you have control of how much the date will affect the score. If you decide to go additive be careful with the order of magnitude of the scores : Your relevancy score magnitude will variate depending on the query and the index while your additive boost is going to be < constant. Regards [1] https://nolanlawson.com/2012/06/02/comparing-boost-methods-in-solr/ ----- --------------- Alessandro Benedetti Search Consultant, R&D Software Engineer, Director Sease Ltd. - www.sease.io -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
