Clear ! Now I understand the current situation. Hope the issue will be fixed soon and the conference is recorded, good luck!
Cheers 2015-09-25 15:22 GMT+01:00 Yonik Seeley <ysee...@gmail.com>: > On Fri, Sep 25, 2015 at 5:07 AM, Alessandro Benedetti > <benedetti.ale...@gmail.com> wrote: > > There is an undocumented "method" parameter - I need to enable that to > > > >> allow switching between the docvalues approach and the UnInvertedField > >> approach. > >> > > > > Only to clarify, please correct me Yonik if my understanding is wrong or > > outdated : > > To calculate facets, without going into the algorithm details there are 2 > > approaches available : > > Term Enum ( good for limited number of unique values for your field) and > Fc > > ( FieldCache) good for a lot of unique values, but not for big fields. > > > > For the FC approach, > > - storing the DocValues for the field would transparently use them ( > with > > the known benefit at the cost of disk space for the docValues data > > structures) > > - without the DocValues , there algorithm will un-invert the index at > > runtime using the field cache to store the results > > Yeah, that's right so far. > We should add a switch though for the method of uninversion... > UnInvertedField (for indexes that change less frequently) vs DocValues > (i.e. if you didn't index with DocValues, UnInvertedReader will > uninvert to an in-memory structure that looks like DocValues). > > > So , from your quote, Term Enum will not be supported by Json Faceting ? > > We can, it just hasn't been a priority yet. > > Anyway, I'm going to step away from email and > https://issues.apache.org/jira/browse/SOLR-8096 for a couple of days. > I need to go focus on putting some slides together for > Strata/HadoopWorld next week. I'll be talking about the new facet > module / json facets there. > > -Yonik > -- -------------------------- Benedetti Alessandro Visiting card - http://about.me/alessandro_benedetti Blog - http://alexbenedetti.blogspot.co.uk "Tyger, tyger burning bright In the forests of the night, What immortal hand or eye Could frame thy fearful symmetry?" William Blake - Songs of Experience -1794 England
