Hi Alex,
Which DBpedia database file have you downloaded and what database are
you hosting it in ? The current live DBpedia sparql endpoint
(http://dbpedia.org/sparql
) is hosted in Virtuoso:
http://wiki.dbpedia.org/OnlineAccess#h28-3
If you don't have Virtuoso already an open source version is available
from:
http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/
With an installer script for loading DBpedia datasets available from:
http://s3.amazonaws.com/dbpedia-data/dbpedia_load.tar.gz
General performance tuning guideline are available at:
http://s3.amazonaws.com/dbpedia-data/dbpedia_load.tar.gz
Alternatively, the the DBpedia 3.3 dataset is available as a Public
AWS dataset in the cloud and can be loaded into a Virtuoso Amazon EC2
AMI in minutes at detailed at:
http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtAWSPublicDataSets
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
Twitter: http://twitter.com/OpenLink
On 23 Oct 2009, at 12:38, zhirun yu wrote:
> Hi,
> I have downloaded the dbpedia database, but I find it impossible
> to query against large files ,say geo_en.nt ,which is 150M in size.
> I can't read the whole file into my 1G memory and use rdflib to do
> query . Can anybody give some hint?
> Thanks in advance.
> Alex
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