Thanks! That did the trick! Although it required some more work in the component level of generating the same query key as the index searcher else when you go to try and fetch scores for a cached query result, I got a lot of NPE since the stats are computed in the collector level which for me isn't set since the cache hit bypasses the lucene level. I'll write up what I did and probably try and open source the work for others to see. The stuff with PostFiltering is nice but needs some examples and documentation.. hopefully mine will help the cause.
Thanks again Amit On Wed, Sep 26, 2012 at 5:13 AM, Mikhail Khludnev <mkhlud...@griddynamics.com> wrote: > I suggest to create a component, put it after QueryComponent. in prepare it > should add own PostFilter into list of request filters, your post filter > will be able to inject own DelegatingCollector, then you can just add > collected histogram into result named list > http://searchhub.org/dev/2012/02/10/advanced-filter-caching-in-solr/ > > On Tue, Sep 25, 2012 at 10:03 PM, Amit Nithian <anith...@gmail.com> wrote: > >> We have a federated search product that issues multiple parallel >> queries to solr cores and fetches the results and blends them. The >> approach we were investigating was taking the scores, normalizing them >> based on some distribution (normal distribution seems reasonable) and >> use that "z score" as the way to blend the results (else you'll be >> blending scores on different scales). To accomplish this, I was >> looking to get the distribution of the scores for the query as an >> analog to the "stats component" but seem to see the only way to >> accomplish this would be to create a custom collector that would >> accumulate and store this information (mean, std-dev etc) since the >> stats component only operates on indexed fields. >> >> Is there an easy way to tell Solr to use a custom collector without >> having to modify the SolrIndexSearcher class? Maybe is there an >> alternative way to get this information? >> >> Thanks >> Amit >> > > > > -- > Sincerely yours > Mikhail Khludnev > Tech Lead > Grid Dynamics > > <http://www.griddynamics.com> > <mkhlud...@griddynamics.com>
