Re: Clearing cache does not effect query execution time

2015-08-24 Thread Rob Vesse
Comments inline: On 24/08/2015 14:28, Ankur Padia padiaan...@gmail.com wrote: Hello everyone, I want to execute a bunch of queries on Fuseki server using default settings and want to clear cache. To accomplish the goal mentioned, I used following linux command to clean the cache, *sync;

Re: Fuseki 2 HA or on-the-fly backups?

2015-08-24 Thread Jason Levitt
Great info, thanks. Some organisations achieve this by running a load balancer in front of several replicas then co-ordinating the update process. So, they're running the same query against other nodes behind the load balancer to keep things in sync? You can do a live backup So, an HTTP

Re: Apache Maven

2015-08-24 Thread aj...@virginia.edu
Apache Maven is the build management system used by Jena. You will find info here: https://maven.apache.org/ If you are just using Jena as a framework or toolkit you will probably not need Maven. If you intend to do actual development work on Jena, you will need to become familiar with Maven.

Apache Maven

2015-08-24 Thread kumar rohit
What Apache Maven in Eclipse is used for? In what type of application we need it? Also I have found various tutorials showing downloading, installing, and integrating Maven in Eclipse but I think Eclipse has already Maven installed and integrated. Is it so?

Re: Clearing cache does not effect query execution time

2015-08-24 Thread Andy Seaborne
There is another important cache - the node table cache is not a filing system cache at all. It's in-process, in Java, cache. It caches what is otherwise random I/O and potentially expensive. Depends on what your queries are as to which caching effects dominate execution. SELECT * { ?s ?p

Re: Fuseki 2 HA or on-the-fly backups?

2015-08-24 Thread Andy Seaborne
On 24/08/15 16:15, Jason Levitt wrote: Great info, thanks. Some organisations achieve this by running a load balancer in front of several replicas then co-ordinating the update process. So, they're running the same query against other nodes behind the load balancer to keep things in sync?

Re: Apache Maven

2015-08-24 Thread kumar rohit
what does actual development work on Jena, means? can you differentiate between Jena as a framework and actual development with Jena? On Mon, Aug 24, 2015 at 4:21 PM, aj...@virginia.edu aj...@virginia.edu wrote: Apache Maven is the build management system used by Jena. You will find info

Re: Apache Maven

2015-08-24 Thread Colin Maudry
Hi Kumar, What you describe is using Jena. Doing development means writing code to extend Jena functionality with plugins, bug fixes, etc. So it seems like you don't need Maven. Colin On 24/08/2015 18:10, kumar rohit wrote: yes I develop ontology in Protege, import it in Jena, iterate

Re: Fuseki 2.0 configuration issues

2015-08-24 Thread Adrian Gschwend
On 24.08.15 13:05, Andy Seaborne wrote: Hi Andy, Adrian - That would be perfect. I don't think I need the data, just the setup. It would also be useful to know exactly how you are making the call. A per-query timeout is possible with the header Timeout: or parameter timeout=. I use this

Re: Apache Maven

2015-08-24 Thread kumar rohit
I got it.. thanks On Mon, Aug 24, 2015 at 5:32 PM, Colin Maudry co...@maudry.com wrote: Hi Kumar, What you describe is using Jena. Doing development means writing code to extend Jena functionality with plugins, bug fixes, etc. So it seems like you don't need Maven. Colin On

Re: Upgrading from Fuseki 2.0 to 2.3

2015-08-24 Thread Colin Maudry
Thanks Adam! I guess a System requirements section in here would be useful https://jena.apache.org/documentation/fuseki2/ I'd be glad to add it if I could. Colin On 24/08/2015 19:27, aj...@virginia.edu wrote: Fuseki (and the rest of Jena) now requires Java 8. That's the problem you have

Re: Fuseki 2.0 configuration issues

2015-08-24 Thread Andy Seaborne
On 23/08/15 16:23, Adrian Gschwend wrote: On 09.07.15 11:03, Andy Seaborne wrote: Hi Andy, Could this be JENA-918? Andy https://issues.apache.org/jira/browse/JENA-918 oh I didn't see there is a tdb-config as well. I just changed it there to 5000ms and I still get the error. Can I

Re: About SPARQL predicates as variables...

2015-08-24 Thread Mark Feblowitz
It occurred to me that I had previously tested a related (sub)query and it seems very simple and quick, looking for predicates for a given entity: PREFIX : http://dbpedia.org/resource/ PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns# SELECT (COUNT(DISTINCT ?predicate) as ?PC) WHERE {