Thorsten Möller wrote: > Hi > > I guess some of you have noticed the recent paper on comparing performance of > prominent triple stores [1].
Yep [1]. > Do you consider it a fair benchmark (set up, data set, queries), considering > the fact that TDB's performance isn't that good according to the results. Any > objections, comments on the paper? Adding DBPSB to the list of JenaPerf benchmarks would probably be an useful contribution: https://svn.apache.org/repos/asf/incubator/jena/Experimental/JenaPerf/trunk/Benchmarks/ I've had no time to run DBPSB myself or look in details each of the DBPSB queries, unfortunately. But, this is IMHO something useful to do. Benchmarks are useful to compare different systems. However, the best benchmark is the one you build yourself, using your data and the queries you need or your users are more likely to write. The aim of JenaPerf, as I see it, it to make as easy as possible to add new datasets and queries and run your benchmark. Personally, I tend to classify SPARQL queries in two broad categories: interactive and analytic. For interactive queries, I'd like to have sub-second response times. If that is not always possible, I desperately want a cache layer in front. For analytic queries, it does not really matter a few seconds or minutes (or hours!) difference. I just want the answer (in a reasonable amount of time). IMHO SPARQL (as SQL) is an unconstrained language in term of complexity of queries people can run... this makes a lot of things more "interesting" and challenging. (Compare with heavily constrained query languages from other NoSQL systems: MQL [2], CQL [3], ...) Last but not least, IMHO benchmarks are very useful tools in showing people and developers that there is room for improvement. Performances and scalability are very important and I welcome any progress TDB and ARQ makes on these aspects. But, I also value: being an open source project with an active community (and hopefully growing) of users and contributors around (including you! :-)), ease of installation, extensibility, compliance with W3C recommendations, ease of integration with other (Java) projects, quality and speed of support (via mailing list or commercial alternatives), etc. Do you want to help adding DBPSB to JenaPerf? :-) Paolo [1] http://markmail.org/message/n32zifhgl52kilkz [2] http://wiki.freebase.com/wiki/MQL [3] https://www.google.com/#q="Cassandra+Query+Language"; > > Thorsten > > [1] > http://iswc2011.semanticweb.org/fileadmin/iswc/Papers/Research_Paper/03/70310448.pdf > >
