Hi Vincenzo, Unless you have really specific ranking requirements, I would not suggest you to start with you proprietary similarity implementation. In most cases edismax will be good enough to cover your requirements. It is not easy task to tune edismax since it has a log knobs that you can use. In general there are two approaches that you can use: Create a golden set of query-results pairs and use it with some metric (e.g. you can start with simple F-measure) and tune parameters to maximize metric. The alternative approach (complements the first one) is to let user use your search, track clicks and monitor search metrics like mean reciprocal rank, zero result queries, page depth etc. and tune queries to get better results. If you can do A/B testing, you can use that as well to see which changes are better. In most cases, this is iterative process and you should not expect to get it right the first time and that you will be able to tune it to cover all cases.
Good luck! HTH, Emir -- Monitoring - Log Management - Alerting - Anomaly Detection Solr & Elasticsearch Consulting Support Training - http://sematext.com/ > On 16 Oct 2017, at 10:30, Vincenzo D'Amore <v.dam...@gmail.com> wrote: > > Hi all, > > I'm trying to figure out how to tune Solr for an e-commerce search. > > I want to share with you what I did in the hope to understand if I was > right and, if there, I could also improve my configuration. > > I also read that the boolean model has to be preferred in this case. > > https://nlp.stanford.edu/IR-book/html/htmledition/the-extended-boolean-model-versus-ranked-retrieval-1.html > > > So, I first wrote my own implementation of DefaultSimilarity returning > constantly 1.0 for TF and IDF. > > Now I'm struggling to understand how to configure tie-break parameter, my > opinion was to configure it to 0.1 or 0.0, thats because, if I understood > well, in this way the boolean model should be preferred, that's because > only the maximum scoring subquery contributes to final score. > > https://lucene.apache.org/solr/guide/6_6/the-dismax-query-parser.html#TheDisMaxQueryParser-Thetie_TieBreaker_Parameter > > > Not sure if this could be enough or if you need more information, thanks in > advance for anyone would add a bit in this discussion. > > Best regards, > Vincenzo > > -- > Vincenzo D'Amore > email: v.dam...@gmail.com > skype: free.dev > mobile: +39 349 8513251 <349%20851%203251>
