Roberto,
I think http://joernhees.de/blog/2010/10/31/setting-up-a-local-dbpedia-mirror-with-virtuoso/ is very useful. We (well, Sarven, in CC) have done it for the DBpedia mirror Ireland [1] with the following spec: System: Ubuntu x86_64 GNU/Linux Memory: 16GB Disk: 2TB (swap: 16 GB) Filesystem: ext4 Server: Apache/2.2.14 Datadump: Source: http://downloads.dbpedia.org/ Modified: 2011-09-13 Size on disk: 354GB Number of files: 17694 HTTP GET time length: ~3 days (~65.5 hours for raw files at 1.5MB/s + overhead) Replication: Requirements: wget HTTP GET command: wget -vcNr -w5 -np -nH http://downloads.dbpedia.org/ HTH ... Cheers, Michael [1] http://ie.mirror.linkeddata.org/dbpedia/ -- Dr. Michael Hausenblas, Research Fellow LiDRC - Linked Data Research Centre DERI - Digital Enterprise Research Institute NUIG - National University of Ireland, Galway Ireland, Europe Tel. +353 91 495730 http://linkeddata.deri.ie/ http://sw-app.org/about.html On 29 Feb 2012, at 12:27, Roberto Mirizzi wrote: > Hi all, > I think one of our IP addresses has been blacklistened by dbpedia > servers. We use these addresses just for research purposes within my > university. Who should I contact for kindly asking to enable it again? > > Ok, the obvious answer to this question could be: "install a local > dump > of DBpedia and don't bother DBpedia server". > Well, that's what I would really like to do. We used to have dbpedia > dumps 3.5. Then, we recently decided to install a brand new fresh > version with dump 3.7. The nightmare started. :-) Here's my story. > > I successfully installed Virtuoso Opensource 6.1.4 (latest version) > on a > Linux Ubuntu 10.04 64bit distribution with 32GB ram. > Then, I tried several times to follow the instructions at: > http://www.openlinksw.com/dataspace/dav/wiki/Main/VirtBulkRDFLoaderExampleDbpedia > (I successfully did the same a couple of years ago for dump 3.5). > Unfortunately, after one hour or two of correct execution, the > rdf_loader_run() procedure stucks, the virtuoso-t process result > active > (at least it seems to be active since a "ps aux|grep virtuoso" shows > me > the process has not been killed), but everything concerning virtuoso > seems to be dead: the web interface http://localhost:8890 does not > respond anymore, a "top" command from the shell does not show > "virtuoso" > (while in the beginning it used 100% of CPU), the "isql-v" command > allows me to correctly log in, but then the instructions does not > respond. > The virtuoso.log file does not show anything wrong. > > Finally, I've observed (from the virtuoso.log file) some of the .nt > files of the dump contain incorrect triples. For example, I get this > error message: > File /dbpedia-dump/3.7/en/external_links_en.nt error 23000 SR133: Can > not set NULL to not nullable column 'DB.DBA.RDF_QUAD.O' > > The problem is that when such an error is encountered, I think the > loading of that file does not go on. In other words, I could lose > important triples. > > Does anyone has any successfully/unsuccessfully experiences about > installing DBpedia dump 3.7 on Virtuoso? > > ps: where is the openlinksw beloved endpoint? > http://lod.openlinksw.com/sparql/ > > > Thanks in advance, > roberto > > -- > Roberto Mirizzi > Politecnico of Bari > http://sisinflab.poliba.it/mirizzi > > > > ------------------------------------------------------------------------------ > Virtualization & Cloud Management Using Capacity Planning > Cloud computing makes use of virtualization - but cloud computing > also focuses on allowing computing to be delivered as a service. > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > _______________________________________________ > Dbpedia-discussion mailing list > Dbpedia-discussion@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Dbpedia-discussion mailing list Dbpedia-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
