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
