On 10/9/11 5:56 PM, Mohamed Morsey wrote:
Dear all,the AKSW [1] group is pleased to announce the development of a benchmark called DBpedia SPARQL Benchmark (DBPSB) for evaluating and comparing the performance of Virtuoso, Sesame, Jena-TDB, and BigOWLIM. We have also written a paper about it. It indicates our experiment and the results we obtained. It is available at “http://iswc2011.semanticweb.org/fileadmin/iswc/Papers/Research_Paper/03/70310448.pdf”. This page, “http://aksw.org/Projects/DBPSB”, indicates the results in more detail. Any feedback and/or suggestions are highly appreciated.
Mohamed,Since Virtuoso exists in Single-Server and Cluster Editions, it's really important that you don't use "Virtuoso" generically in benchmark. Thus, please use "Virtuoso Single-Server" and "Virtuoso Cluster Edition" where appropriate.
Simple effects: the cluster edition offers full parallelization which even applies to a single machine hosting multiple Virtuoso instances working in parallel. Immediate effect is that DB load times are much faster. Also note that the live instance of DBpedia is based on a 4-node cluster hosted on a single machine.
I haven't delved into the results, yet, but the qualification immediately caught my attention when I saw the dataset load times.
Note: on the lod.openlinksw.com instance which has an 8-node cluster spread over 8 machines, we have been able to load the entire DBpedia dataset in under 20 mins., courtesy of 8 virtuoso instances working in parallel across 8 machine hosts.
-- Regards, Kingsley Idehen President& CEO OpenLink Software Web: http://www.openlinksw.com Weblog: http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca: kidehen
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