Thanks for your reply
________________________________
From: Patrick van Kleef <[email protected]>
To: sareh aghaei <[email protected]>
Cc: [email protected]
Sent: Fri, June 24, 2011 2:20:58 PM
Subject: Re: [Dbpedia-discussion] default limitation for fetching triples from
dbpedia endpoint
Hi Sareh,
>
> Is there any default limitation in sparql queries from dbpedia
>endpoint?(http://dbpedia.org/sparql)
> I think the maximum of triples that can be fetched is 2000 triples for every
>query, how can I omit this limitation?
> I'll be so pleased for your helping
The http://dbpedia.org/sparql endpoint has both rate limiting on the number of
connections/sec you can make, as well as restrictions on resultset and query
time, as per the following settings:
[SPARQL]
ResultSetMaxRows = 2000
MaxQueryExecutionTime = 120
MaxQueryCostEstimationTime = 1500
These are in place to make sure that everyone has a equal chance to
de-reference
data from dbpedia.org, as well as to guard against badly written queries/robots.
The following options are at your disposal to get round these limitations:
1. Use the LIMIT and OFFSET keywords
You can tell a SPARQL query to return a partial result set and how many
records
to skip e.g.:
select ?s where { ?s a ?o }
LIMIT 1000 OFFSET 2000
2. Setup a dbpedia database in your own network
The dbpedia project provides full datasets, so you can setup your own
installation
on a sufficiently powerful box using Virtuoso Open Source Edition.
3. Setup a preconfigured installation of Virtuoso + database using Amazon EC2
(not free)
See: http://www.openlinksw.com/dataspace/dav/wiki/Main/VirtAWSDBpedia351C
Please let me know if you have any questions on this or any other dbpedia
sparql
endpoint issue.
Best regards,
Patrick
----
OpenLink Software
------------------------------------------------------------------------------
All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense..
http://p.sf.net/sfu/splunk-d2d-c1
_______________________________________________
Dbpedia-discussion mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
