Hi Bastian You most probably need to update or add the NumberOfBuffers ini file parameter to the [Parameters] section of the Virtuoso configuration file as detailed at:
http://docs.openlinksw.com/virtuoso/dbadm.html#ini_Parameters Note that Dbpedia is actually hosted on a Virtuoso server see http://dbpedia.org for more details and can be interacted with directly via http://dbpedia.openlinksw.com:8890/sparql or http://dbpedia.openlinksw.com:8890/isparql . Below are the details of how we imported the Dbpedia dataset into Virtuoso: * Download the DBpedia datasets from http://dbpedia.org/docs/#down * Unzip and place all the the datasets file (*.nt) into a directory called "dbpedia_data" * Ensure the "dbpedia_data" directory is added to your "DirsAllowed?" paramter in the Virtuoso Server configuration file and restart the server. * The NumberOfBuffers? paramter of the Virtuoso Server configuration file is set to a suitable value to perform the import,noting that each buffer is 8K bytes of memory. (In our case NumberOfBuffers=300000) * Run the script below from the parent directory of the "dbpedia_data" directory to loop through and import each dataset into your Virtuoso Server #!/bin/sh rm -f load_dbpedia.log for f in `find dbpedia_data -name '*.nt'` do echo "Loading $f `date \"+%H:%M:%S\"`" | tee -a load_dbpedia.log isql 1112 dba dba verbose=on banner=off prompt=off echo=ON errors=stdout exec="ttlp_mt (file_to_string_output ('$f'), '', 'http://dbpedia.org'); checkpoint;" >> load_dbpedia.log done Best Regards, Hugh Williams OpenLink Software On 4/7/07 18:41, "Bastian Quilitz" <quil...@informatik.hu-berlin.de> wrote: > Hello, > > I am experimenting with virtuoso open source as rdf store. I tried to import > a dbpedia dataset (1.6M triples) into the demo database (demo.ini) on a > 8xOpteron(dualCore) with a lot of ram. This took around 3h and I am > wondering whether this is a reasonable time? Although there were some other > users using the machine (total cpu avg. was around 50%, RAM available >5GB) > this seems to be quiet slow (~130triples/sec). I used the ttpl_mp() function > to import the triples from a local file. > > Am I doing something wrong or are there tuning options I should use? > > > Kind regards, > Bastian > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Virtuoso-users mailing list > Virtuoso-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/virtuoso-users
