No, SSDVFF does not do hierarchical faceting today, but this is just a limitation of the current implementation, and with some changes (patches welcome!), it could do so.
Mike McCandless http://blog.mikemccandless.com On Mon, Nov 14, 2016 at 1:38 AM, Chitra R <chithu.r...@gmail.com> wrote: > > Hey, thank you so much for the fast response, I agree NRT refresh is > somewhat costly operations and this is the major pitfall, suppose we use doc > value faceting. > > > While indexing SortedSetDocValuesFacetField , it stores > path and dimension of the given field internally. So Can we achieve > hierarchical facets using DrillDownQuery? Hope, purpose of storing path and > dimension is to achieve hierarchical facets. If yes (ie we can achieve > hierarchy in SSDVFF) , so what is the need to move over taxonomy? > Else I missed anything? > > > What is the real purpose to store path and dimension in > SSDVF field? > > > Kindly post your suggestions. > > Regards, > Chitra > > > > On Sat, Nov 12, 2016 at 4:03 AM, Michael McCandless > <luc...@mikemccandless.com> wrote: >> >> On Fri, Nov 11, 2016 at 5:21 AM, Chitra R <chithu.r...@gmail.com> wrote: >> >> > i)Hope, when opening SortedSetDocValuesReaderState , we are >> > calculating ordinals( this will be used to calculate facet count ) for >> > doc >> > values field and this only made the state instance somewhat costly. >> > Am I right or any other reason behind that? >> >> That's correct. It adds some latency to an NRT refresh, and some heap >> used to hold the ordinal mappings. >> >> > ii) During indexing, we are providing facet ordinals in each >> > doc >> > and I think it will be useful in search side, to calculate facet counts >> > only for matching docs. otherwise, it carries any other benefits? >> >> Well, compared to the taxonomy facets, SSDV facets don't require a >> separate index. >> >> But they add latency/heap usage, and they cannot do hierarchical >> facets yet (though this could be fixed if someone just built it). >> >> > iii) Is SortedSetDocValuesReaderState thread-safe (ie) multiple >> > threads can call this method concurrently? >> >> Yes. >> >> Mike McCandless >> >> http://blog.mikemccandless.com > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
