[Virtuoso-users] Adding virtuoso to rdf4j failed

I wanted to add a virtuoso repository with the rdf4j workbench and did the necessary setup according to the wiki. I'm running virtuoso 7.2.4 open source on ubuntu 16.04 LTS with rdf4j 2.2.1 and tomcat 8.0.39. Setup steps: 1. Copy virtjdbc4_2.jar and virt_rdf4j.jar into the rdf4j server and workb

Re: [Virtuoso-users] Adding virtuoso to rdf4j failed

e+ -- http://plus.google.com/100570109519069333827/ > Facebook -- http://www.facebook.com/OpenLinkSoftware > Universal Data Access, Integration, and Management Technology Providers > > > >> On 6 Jun 2017, at 11:16, Henrik Schmidt > <mailto:h...@informatik.uni-k

Re: [Virtuoso-users] Adding virtuoso to rdf4j failed

ny/openlink-software/ > Twitter -- http://twitter.com/OpenLink > Google+ -- http://plus.google.com/100570109519069333827/ > Facebook -- http://www.facebook.com/OpenLinkSoftware > Universal Data Access, Integration, and Management Technology Providers > > > >> On 13 Jun 2017, at 13:4

[Virtuoso-users] Virtuoso Jena provider

Hi, is the virtuoso jena provider compatible with jena > 3.0.x like 3.2 or 3.3 ? The VOS wiki is only talking abot 3.0.x Best, Henrik -- Check out the vibrant tech community on one of the world's most engaging tech site

Re: [Virtuoso-users] Adding virtuoso to rdf4j failed

Hi Adam, can you explain why your solution was necessary and it did work without it for me ? Best Henrik Adam Sanchez schrieb am 23.06.2017 um 13:57: > Hi Hugh, > > Finally I found my own solution. I am not very proud but it works at least. > Well, I have to compile RDF4J (https://github.com/ec

[Virtuoso-users] Complete DB in RAM

Hi, we have a database of about 850mio triples, the file virtuoso.tx is about 50GB size on disk. While our application will only do SELECT queries. What is the best configuration to keep the complete set in RAM so no disk reads apart from the initial caching is needed ? How can we configure thi

Re: [Virtuoso-users] compile error

Running Ubuntu ? Check this issue and the solution for me at the bottom : https://github.com/openlink/virtuoso-opensource/issues/677 Best, Henrik Roland Cornelissen schrieb am 12.10.2017 um 13:06: > Hi, > > I just pulled the latest code from the DEvelop7 branch and get an error > when configur

[Virtuoso-users] jena provider instead of rdf4j provider

Hi, what is a comaparable jena provider query to this rdf4j provider query ? TupleQuery tupleQuery = connection.prepareTupleQuery(QueryLanguage.SPARQL, query); I want to use the jena provider instead and I'm using this threaded so it must be connection based. My current jena implementation is u

Re: [Virtuoso-users] jena provider instead of rdf4j provider

penLinkSoftware Universal Data Access, Integration, and Management Technology Providers On 21 Nov 2017, at 14:56, Henrik Schmidt wrote: Hi, what is a comaparable jena provider query to this rdf4j provider query ? TupleQuery tupleQuery = connection.prepareTupleQuery(QueryLanguage.SPARQL, query); I

Re: [Virtuoso-users] jena provider instead of rdf4j provider

.facebook.com/OpenLinkSoftware > Universal Data Access, Integration, and Management Technology Providers > > > >> On 22 Nov 2017, at 08:05, Henrik Schmidt wrote: >> >> Hi Hugh, >> >> the problem is that the jena code is blocking while executing whereas the >&g

Re: [Virtuoso-users] jena provider instead of rdf4j provider

9519069333827/ Facebook -- http://www.facebook.com/OpenLinkSoftware Universal Data Access, Integration, and Management Technology Providers On 22 Nov 2017, at 12:28, Henrik Schmidt wrote: Hi Hugh, Problem solved, I had to call new virtGraph = VirtGraph() for each query and not only once. Before

Re: [Virtuoso-users] jena provider instead of rdf4j provider

Regards >>> Hugh Williams >>> Professional Services >>> OpenLink Software, Inc.  //  http://www.openlinksw.com/ >>> Weblog   -- http://www.openlinksw.com/blogs/ >>> LinkedIn -- http://www.linkedin.com/company/openlink-software/ >>>

[Virtuoso-users] alternative options for query timeouts

Hi, we are using the jena and/or rdf4j provider for some long running queries on our DB. Are there options for query cost/time estimations or anytime queries (like for SPAQL endpoints) for these providers instead of opting for hard query timeouts ? Best, Henrik

Re: [Virtuoso-users] alternative options for query timeouts

Facebook -- http://www.facebook.com/OpenLinkSoftware > Universal Data Access, Integration, and Management Technology Providers > > > >> On 28 Nov 2017, at 10:32, Henrik Schmidt wrote: >> >> Hi, >> >> we are using the jena and/or rdf4j provider for some long r

[Virtuoso-users] Make use of MaxQueryCostEstimationTime

Hi, is there a way to make good use of MaxQueryCostEstimationTime to prevent extremly long running queries ? For the 'real' SELECT query we want to use the jena provider but the idea is to first ask the SPARQL port to check whether the query is immediately rejected due to MaxQueryCostEstimat

Re: [Virtuoso-users] Query optimization, possible indexing?

If there will be a fix for this it would be nice this solution for the jena provider will be also added to the main repo : https://github.com/openlink/virtuoso-opensource/issues/687 Am 25.01.2018 um 11:19 schrieb Hugh Williams: Hi Quentin, Thanks for the input, I see what you mean as the jena

[Virtuoso-users] indexTreeMap set twice

Hi, is there a specific reason why indexTreeMaps is set two times in virtuoso.ini ? I guess not. First it is set to 256 and afterwards to 64. Which value is the preferred one ? Best, Henrik Schmidt -- Check out