NP, good luck!
On Sun, Sep 23, 2012 at 3:41 PM, <milen.ti...@materna.de> wrote: > Hello Erick, > > Thanks a lot for your reply! Your suggestion is actually exactly the > alternative solution we are thinking about and with your clarification on > Solr's performance we are going to go for it! Many thanks again! > > Milen > > ________________________________________ > Von: Erick Erickson [erickerick...@gmail.com] > Gesendet: Sonntag, 23. September 2012 17:50 > An: solr-user@lucene.apache.org > Betreff: Re: Help with new Join Functionallity in Solr 4.0 > > The very first thing to try is flatten your data so you don't have to use > joins. > I know that goes against your database instincts, but Solr easily handles > millions and millions of documents. So if the cross-product of docs and > modules > isn't prohibitive, that's what I'd do first. Then it's just a matter of > forming a search without joins.... > > Joins run into performance issues when the join field has many unique > values, unfortunately the field people often want to join on is something > like a <uniqueKey> (or PK in RDBMS terms), so be aware of that. > > Best > Erick > > On Fri, Sep 21, 2012 at 5:46 AM, <milen.ti...@materna.de> wrote: >> Dear Solr community, >> >> I am rather new to Solr, however I already find it kind of attractive. We >> are developing a research application, which contains a Solr index with >> three different kinds of documents, here the basic idea: >> >> >> - A document of type "doc" consisting of fields id, docid, doctitle >> and some other metadata >> >> - A document of type "module" consisting of fields id, modid and >> text >> >> - A document of type "docmodule" consisting of fields id, docrefid, >> modrefid and some metadata about the relation between a document and a >> module; filed docrefid refers to the id of a "doc" document, while field >> modrefid contains the id of a "module" document >> >> In other words, in our model there are documents (type "doc") consisting of >> several modules and there is some characterization of each link between a >> document and a module. >> >> Almost all fields of a "doc" document are searchable, as well as the text of >> a module and the metadata of the "docmodule" entries. >> >> We are looking for a fast way to retrieve all modules containing a certain >> text and associated with a given document, preferably with a single query. >> This means we want to query the text from a "module" document while we set a >> restriction on the docrefid from a "docmodule" or the id from a "doc" >> document. Is this possible by means of the new pseudo joins? Any ideas are >> highly appreciated! >> >> Thanks in advance! >> >> Milen Tilev >> Master of Science >> Softwareentwickler >> Business Unit Information >> ________________________________________________ >> >> MATERNA GmbH >> Information & Communications >> >> Voßkuhle 37 >> 44141 Dortmund >> Deutschland >> >> Telefon: +49 231 5599-8257 >> Fax: +49 231 5599-98257 >> E-Mail: milen.ti...@materna.de<mailto:milen.ti...@materna.de> >> >> www.materna.de<http://www.materna.de/> | >> Newsletter<http://www.materna.de/newsletter> | >> Twitter<http://twitter.com/MATERNA_GmbH> | >> XING<http://www.xing.com/companies/MATERNAGMBH> | >> Facebook<http://www.facebook.com/maternagmbh> >> ________________________________________________ >> >> Sitz der MATERNA GmbH: Voßkuhle 37, 44141 Dortmund >> Geschäftsführer: Dr. Winfried Materna, Helmut an de Meulen, Ralph Hartwig >> Amtsgericht Dortmund HRB 5839 >>
