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From Marco Neumann <>
Subject Re: DB2, RDF, and Jena?
Date Tue, 03 Apr 2012 21:59:03 GMT
So Timothy Prickett Morgan claims that DB2 outperforms TDB in a Cray
Urika setup by factor 3.5 on some unspecified SPARQL 1.0 query?

On Tue, Apr 3, 2012 at 5:48 PM, Andy Seaborne <> wrote:
> ------------------------------------------
> The Apache Jena project is a Java framework for building semantic web
> applications based on graph data, and Apache Fuseki is the SPARQL server
> that processes the SPARQL queries and spits out the relationships so they
> can be visualized in some fashion. (Cray's new Urika system, announced in
> March, runs this Apache graph analysis stack on top of a massively
> multithreaded server.)
> Just like they imported objects and XML into the DB2 database so they could
> be indexed and processed natively, IBM is now bringing in the RDF format so
> that graph triples can be stored natively.
> As IBM explains it – not strictly grammatically, to some English majors – a
> triple has a noun, a verb, and a predicate, such as Tim (noun) has won
> (verb) the MegaMillions lottery (predicate). You can then query all aspects
> of a set of triples to see who else has won MegaMillions – a short list, in
> this case.
> In tests among DB2 10.1 early adopters, applications that used these graph
> triples ran about 3.5 times faster on DB2 than on the Jena TDB data store
> (short for triple database, presumably) with SPARQL 1.0 hitting it for
> queries.
> ------------------------------------------
> (Dear Reg, TDB does not stand for "triple database")
>        Andy


Marco Neumann

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