Re: [Virtuoso-users] Renaming a big graph

2012-02-09 Thread Martin Gerlach
http://www.facebook.com/OpenLinkSoftware Universal Data Access, Integration, and Management Technology Providers On 8 Feb 2012, at 12:21, Martin Gerlach wrote: Hi Hugh, > virtuoso-t -? Virtuoso Open Source Edition (multi threaded) Version 6.1.3-pre1.3127-pthreads as of Sep 23 2010 Compiled for Linux

Re: [Virtuoso-users] Renaming a big graph

2012-02-08 Thread Martin Gerlach
com/company/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 23 Jan 2012, at 13:59, Martin Gerlach wr

Re: [Virtuoso-users] Renaming a big graph

2012-01-23 Thread Martin Gerlach
://www.facebook.com/OpenLinkSoftware Universal Data Access, Integration, and Management Technology Providers On 23 Jan 2012, at 10:49, Martin Gerlach wrote: Hi, I'd like to rename a graph with about 150 million triples in Virtuoso Open Source 6.1 The Virtuoso db file has 16GB. Which i

Re: [Virtuoso-users] Renaming a big graph

2012-01-23 Thread Martin Gerlach
e server to properly enter the use of memory reserve but not cancel the dangerous activity and not recover after the disaster. Best Regards, Ivan Mikhailov OpenLink Software http://virtuoso.openlinksw.com -- ---- *Martin Gerl

[Virtuoso-users] Renaming a big graph

2012-01-23 Thread Martin Gerlach
Hi, I'd like to rename a graph with about 150 million triples in Virtuoso Open Source 6.1 The Virtuoso db file has 16GB. Which is the best way to rename such a big graph? Going through Conductor/RDF/Graphs/rename or using isql? Which are the required buffer sizes for renaming the graph? I

Re: [Virtuoso-users] DateTime literal timezone handling

2011-12-15 Thread Martin Gerlach
ONE, i.e. cases 2 and 3 below. Cheers, Martin On 15.12.2011 12:04, Martin Gerlach wrote: Hi, has there been any progress on the DateTime/timezone bug as reported by Timo in May? Are there any patches or even new releases containing a fix? In Virtuoso OS 6.0.1.3127 I observed the following beh

Re: [Virtuoso-users] DateTime literal timezone handling

2011-12-15 Thread Martin Gerlach
r should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay ___ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.ne

[Virtuoso-users] "0001"^^xsd:gYear

2011-06-21 Thread Martin Gerlach
any chance been addressed in version 6.1.3? Cheers, Martin -- ------------ *Martin Gerlach* Senior Softwareentwickler Research Neofonie GmbH Robert-Koch-Platz 4 10115 Berlin T +49.30 24627 *413* F +49.30 24627 120 martin.gerl...@neofonie.de http://www.neofonie.de Handelsregister Berlin-Charlottenburg: HRB 67460 Geschäftsführung Thomas Kitlitschko Dr. Mario Lenz

[Virtuoso-users] Comparing date/time literals of different types

2011-06-21 Thread Martin Gerlach
#x27;^^xsd:date) ('2008'^^xsd:gYear >= '2007-01-01'^^xsd:date) WHERE{ } shows that all comparisons using < or > yield 0, whereas all comparisons using <= or >= yield 1 regardless of the actual literal values. (Same if the lhs has xsd:date and the rhs xsd:gYea

Re: [Virtuoso-users] SPARQL with optional and filter combination: Virtuoso Bug or "works as designed"?

2011-03-28 Thread Martin Gerlach
Hi, has anyone looked into the problem I described on March 7? See below. Thanks & Regards, Martin Am 07.03.2011 12:09, schrieb Martin Gerlach: > Hi, > > I observed the following SPARQL behavior with Virtuoso Open Source, > Version 06.01.3127, running on Linux version 2

[Virtuoso-users] SPARQL with optional and filter combination: Virtuoso Bug or "works as designed"?

2011-03-07 Thread Martin Gerlach
s, Martin -- (Of course, one can just make the first optional binding a required binding (result: A1/R1), or move the filter into the first optional block (result: _/R1, A1/R1, _/R2) to obtain results that make more sense. The example is a stripped down version of a more complex use case.)

Re: [Virtuoso-users] sql: and bif: prefixes not working in SPARQL queries

2011-03-02 Thread Martin Gerlach
, e.g. select 5 - 3 can be readed as select (5 - 3) or select (5) (- 3) Best Regards, Ivan Mikhailov OpenLink Software http://virtuoso.openlinksw.com On Tue, 2011-03-01 at 15:26 +0100, Martin Gerlach wrote: Hi, On one of our Virtuoso OpenSource instances, I get the following message 37000

Re: [Virtuoso-users] sql: and bif: prefixes not working in SPARQL queries

2011-03-02 Thread Martin Gerlach
c Hoan wrote: What's your virtuoso edition?commercial or open source?can you give more details about your query? On Tue, Mar 1, 2011 at 2:26 PM, Martin Gerlach mailto:martin.gerl...@neofonie.de>> wrote: Hi, On one of our Virtuoso OpenSource instances, I get the followi

[Virtuoso-users] sql: and bif: prefixes not working in SPARQL queries

2011-03-01 Thread Martin Gerlach
ing happens with any standard sql: and bif: function. It is a standard installation, no special or unusual settings. Any ideas about what may be missing or misconfigured? Cheers Martin -- ------------ *Martin Gerlach* Senior Softwar

Re: [Virtuoso-users] Which indexes could help to improve query performance.

2010-04-23 Thread Martin Gerlach
ret-0" := artm $45 "callret-0" + $39 "callret" 15: BReturn 0 } Select ($45 "callret-0", <$42 "" spec 5>, <$38 "" spec 5>, <$34 "" spec 5>, <$29 "" spec 5>) } 49 Rows. -- 3 msec. Am 22.04.2010 1

Re: [Virtuoso-users] Which indexes could help to improve query performance.

2010-04-22 Thread Martin Gerlach
Hi Mitko, I executed the query many times with no notable improvement of response time. We are not using striped setup. I rebooted Virtuoso, checked the stats, ran the query and re-checked the stats. Onle the RDF_QUAD (primary key?) and RDF_QUAD_POGS indexes seem to be used, see below. Cheers,

Re: [Virtuoso-users] Which indexes could help to improve query performance.

2010-04-22 Thread Martin Gerlach
e) across: > > 1. http://dbpedia.org/sparql > 2. http://lod.openlinksw.com/sparql -- this has 8.5 Billion+ Triples. > > Then we can complete analysis of your query using our existing live > instances. > > Kingsley >> Best Regards, >> Mitko >> >&g

Re: [Virtuoso-users] Which indexes could help to improve query performance.

2010-04-22 Thread Martin Gerlach
compiles on your site; to do this put the query in explain > ('sparql ...query here ..') and execute via command line ISQL tool. > When doing explain note that query should begin with SPARQL keyword. > Also what are INI settings in Parameters section specifically > NumberOfBuffers

[Virtuoso-users] Which indexes could help to improve query performance.

2010-04-22 Thread Martin Gerlach
etadata, e.g. provenance, source, time, ...) Any ideas? Thanks and cheers, Martin -- ---- Martin Gerlach Research Neofonie Technologieentwicklung und Informationsmanagement GmbH Robert-Koch-Platz 4 10115 Berlin fon: +49.30 246

[Virtuoso-users] Fwd: Annotating RDF triples with metadata

2010-03-29 Thread Martin Gerlach
e could be expected compared to SPARQL on Triples/Quads? - About named graphs: When and how would you use this approach or how did you use it? - Have you made experiences with n-ary approaches - are there problems/disadvantages with it (e.g. performance issues)? - Do you have any other ideas of stor

[Virtuoso-users] Annotating RDF triples with metadata

2010-03-29 Thread Martin Gerlach
e could be expected compared to SPARQL on Triples/Quads? - About named graphs: When and how would you use this approach or how did you use it? - Have you made experiences with n-ary approaches - are there problems/disadvantages with it (e.g. performance issues)? - Do you have any other ideas of stor

[Virtuoso-users] SPARQL query returns blank nodes as literals in some cases

2010-03-04 Thread Martin Gerlach
Cheers, Martin -- -------- Martin Gerlach Softwareentwicklung neofonie Technologieentwicklung und Informationsmanagement GmbH Robert-Koch-Platz 4 10115 Berlin fon: +49.30 24627 413 fax: +49.30 24627 120 martin.gerl...@neofonie.de http://www.neofonie.de Handels