Hi all, thanks to feedback from OpenLink I modified Virtuoso's indexing configuration for my benchmark. The results are much more favorable for Virtuoso now, and there's no need for graph indication. Anyway, I think you just won my benchmark ;) The URL is: http://www4.wiwiss.fu-berlin.de/benchmarks-200801/ (you may need to refresh the page in your browser in order to load the new charts).
Cheers, Christian On Jan 14, 2008, at 3:29 PM, Kingsley Idehen wrote: > Christian Becker wrote: >>> Christian Becker wrote: >>>>> Christian Becker, a student at FU Berlin who is currently >>>>> writing his master thesis about using DBpedia data in a mobile >>>>> context has also run some benchmarks with DBpedia data. He will >>>>> put a link to his results in the Wiki over the week-end. >>>>> >>>>> >>>> >>>> My results are here: http://www4.wiwiss.fu-berlin.de/ >>>> benchmarks-200801/. Feedback is appreciated! >>>> >>>> Cheers, >>>> >>>> Christian >>>> >>> Christian, >>> >>> Do you have .rq files for the queries used in your query >>> benchmarks? >>> >>> Kingsley >> >> Kingsley, >> I attached them and put them on the website as well. >> >> Cheers, >> >> Christian > > Christian, > > Virtuoso is a Quad Store as opposed to a Triple Store. We use Named > Graphs to partition Triples within the DBMS. Thus, you need to > identify the target Graph (via it's URI) in your queries by: > > 1. Using the graph-uri parameter in SPARQL Protocol Queries > 2. FROM Clause in SPARQL statements > 3. Use the Virtuoso's INI "[SPARQL]" to set the Default Graph to a > specific Graph Name > 4. Specific scoping of SPARQL patterns to specific Graphs when > joining across graphs > > Assuming you have DBpedia data in an internal Graph Named: > <http://dbpedia.org > > (*which is what we have in the live instance for example): > > Query 1: > > SELECT ?p ?o > FROM <http://dbpedia.org> > WHERE { > <http://dbpedia.org/resource/Metropolitan_Museum_of_Art> ?p ?o > } > > Kevin Bacon: > > PREFIX p: <http://dbpedia.org/property/> > SELECT ?film1 ?actor1 ?film2 ?actor2 > FROM <http://dbpedia.org> > WHERE { > ?film1 p:starring <http://dbpedia.org/resource/Kevin_Bacon> . > ?film1 p:starring ?actor1 . > ?film2 p:starring ?actor1 . > ?film2 p:starring ?actor2 . > } > > > There are even more tricks to come, but let's get the very basic > stuff in place as your benchmarks currently do not reflect Virtuoso > accurately. At the same time, this isn't your fault as we need to do > a much better job of making the usage scenarios and associated > optimizations much clearer in our usage documentation etc.. > > > Kingsley >> >> >> >> >> >>> >>> >>> >>>> >>>>> ----- Original Message ----- From: "Carl Crowder" <[EMAIL PROTECTED] >>>>> To: <dbpedia-discussion@lists.sourceforge.net> >>>>> Sent: Friday, January 11, 2008 12:22 PM >>>>> Subject: [Dbpedia-discussion] Querying datasets >>>>> >>>>> >>>>> >>>>>> Hello, >>>>>> >>>>>> I've downloaded the datasets from the dbpedia website, and now >>>>>> I'm >>>>>> trying to create a system that allows me to query the data. >>>>>> >>>>>> I've come across things like Jena, but I'm not sure how well it >>>>>> will >>>>>> scale - I've had an import running for about a day and it's >>>>>> nowhere near >>>>>> done! >>>>>> >>>>>> What do you recommend for doing this? What does the dbpedia >>>>>> site use as >>>>>> it's back end? >>>>>> >>>>>> Carl >>>>>> >>>>>> ------------------------------------------------------------------------- >>>>>> Check out the new SourceForge.net Marketplace. >>>>>> It's the best place to buy or sell services for >>>>>> just about anything Open Source. >>>>>> http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace >>>>>> _______________________________________________ >>>>>> Dbpedia-discussion mailing list >>>>>> Dbpedia-discussion@lists.sourceforge.net >>>>>> https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion >>>>>> >>>> >>>> >>>> ------------------------------------------------------------------------- >>>> Check out the new SourceForge.net Marketplace. >>>> It's the best place to buy or sell services for >>>> just about anything Open Source. >>>> http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace >>>> _______________________________________________ >>>> Dbpedia-discussion mailing list >>>> Dbpedia-discussion@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion >>>> >>>> >>> >>> >>> -- >>> >>> >>> Regards, >>> >>> Kingsley Idehen Weblog: http://www.openlinksw.com/blog/ >>> ~kidehen >>> President & CEO OpenLink Software Web: http://www.openlinksw.com >>> >>> >>> >> > > > -- > > > Regards, > > Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen > President & CEO OpenLink Software Web: http://www.openlinksw.com > > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Dbpedia-discussion mailing list Dbpedia-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
