Hi Shai, I was thinking to that too, but I'm indexing all indexes in a custom distributed environment than I can't in this moment have a single categories index for all the content indexes at indexing time. A solution should be to merge all the categories indexes in one only index and use your solution but the merge code I see in the examples merge also the content index and I can't do that.
I should share the taxonomy if is possible to merge (I see the resulting categories indexes are not that big currently), but I would prefer to have a solution where I can collect the facets over multiple categories indexes in this way I will be sure the solution will scale better. Nicola. On Mon, 2013-01-21 at 17:54 +0200, Shai Erera wrote: > Hi Nicola, > > > I think that what you're describing corresponds to distributed faceted > search. I.e., you have N content indexes, alongside N taxonomy > indexes. > > The information that's indexed in each of those sub-indexes does not > correlate with the other ones. > For example, say that you index the category "Movie/Drama", it may > receive ordinal 12 in index1 and 23 in index2. > > If you'll try to count ordinals using MultiReader, you'll just mess up > everything. > > > If you can share a single taxonomy index for all N content indexes, > then you'll be in a super-simple position: > > 1) Open one TaxonomyReader > > 2) Execute search with MultiReader and FacetsCollector > > > > It doesn't get simpler than that ! :) > > > Before I go into great length describing what you should do if you > cannot share the taxonomy, let me know if that's not an option for > you. > > Shai > > > > On Mon, Jan 21, 2013 at 5:39 PM, Nicola Buso <nb...@ebi.ac.uk> wrote: > Thanks for the reply Uwe, > > we currently can search with MultiReader over all the indexes > we have. > Now I want to add the faceting search, than I created a > categories index > for every index I currently have. > To accumulate the faceted results now I have a MultiReader > pointing all > the indexes and I can create a TaxonomyReader for every > categories index > I have; all the way I see to obtain FacetResults are: > 1 - FacetsCollector > 2 - a FacetsAccumulator implementation > > suppose I use the second option. I should: > - search as usual using the MultiReader > - than try to collect all the facetresults iterating over my > TaxonomyReaders; at every iteration: > - I create a FacetsAccumulator using the MultiReader and a > TaxonomyReader > - I get a list of FacetResult from the accumulator. > - as I finish I should in some way merge all the > List<FacetResult> I > have. > > I think this solution is not correct because the docsids from > the search > are pointing the multireader instead the taxonomyreader is > pointing to > the categories index of a single reader. > I neither like to merge all the List of FacetResult I retrieve > from the > Accumulators. > > Probably I'm missing something, can somebody clarify to me how > I should > collect the facets in this case? > > > Nicola. > > > > On Mon, 2013-01-21 at 16:22 +0100, Uwe Schindler wrote: > > Just use MultiReader, it extends IndexReader, so you can > pass it anywhere where IndexReader can be passed. > > > > ----- > > Uwe Schindler > > H.-H.-Meier-Allee 63, D-28213 Bremen > > http://www.thetaphi.de > > eMail: u...@thetaphi.de > > > > > -----Original Message----- > > > From: Nicola Buso [mailto:nb...@ebi.ac.uk] > > > Sent: Monday, January 21, 2013 3:59 PM > > > To: java-user@lucene.apache.org > > > Subject: FacetedSearch and MultiReader > > > > > > Hi all, > > > > > > I'm trying to develop faceted search using lucene 4.0 > faceting framework. > > > In our project we are searching on multiple indexes using > lucene > > > MultiReader. How should we use the faceted framework to > obtain > > > FacetResults starting from a MultiReader? all the example > I see are using a > > > "single" IndexReader. > > > > > > > > > > > > Nicola. > > > > > > > > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: > java-user-unsubscr...@lucene.apache.org > > > For additional commands, e-mail: > java-user-h...@lucene.apache.org > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: > java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: > java-user-h...@lucene.apache.org > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
