Re: [Virtuoso-users] Running to VOS with one virtuoso.db

[Ghislain ATEMEZING]

Hi Hugh,
[ Just wondering if someone ever test the option you proposed]

What would be the use case here? Let's suppose I have then 2 dbs starting
with the HHTP same ports.
Would that mean I can query them once?
Please could you provide us with more advantages of this approach?

TIA
Best,
Ghislain

El jue., 26 ene. 2017 a las 18:37, Hugh Williams ()
escribió:

> Hi Pasquale,
>
> What is the purpose of running two Virtuoso instances, is this for setup
> access for SPARQL or SQL storage ?
>
> The easiest way to start multiple Virtuoso database instances on the same
> machine is to create two separate databases with a “virtuoso.ini” file on
> each set to use unique SQL & HTTP ports and then start each in the separate
> directories with a lock file for each …
>
> Best Regards
> Hugh Williams
> Professional Services
> OpenLink Software, Inc.  //  http://www.openlinksw.com/
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> Universal Data Access, Integration, and Management Technology Providers
>
>
>
> > On 26 Jan 2017, at 14:28, Pasquale Di Donato <
> pasquale.didon...@gmail.com> wrote:
> >
> > Hi all
> >
> > I wanted to run 2 Virtuoso Open Source instances on one virtuoso.db, but
> it seems not possible since when the first instances is run then a lock
> file is created for the DB.
> >
> > Any hint here or is this not possible with the Open Source Edition?
> >
> > Pasquale
> >
> --
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Re: [Virtuoso-users] Error 40001 SR...: Transaction deadlock Re: Running multiple loaders

[Ghislain ATEMEZING]

Hello again,
Maybe I can just try to run one rdf_load_run() and see if it solves my
issue.
Fingers crossed :)

Best,
Ghislain
El mar., 7 feb. 2017 a las 10:34, Ghislain ATEMEZING (<
ghislain.atemez...@gmail.com>) escribió:

> Hello list,
> [ Now I start having issues when loading the dataset...].
>
> I finally launched the script yesterday (thanks Julien) and this morning I
> found that some data were not loaded due to some deadlocks.
>
> == Some background on my hardware and virtuoso server==
>   + RAM: 128 GB, 4 TO SATA, 6C/12T, Ubuntu 16
>   + VOS 07.20 on Linux
>   + My ini file is attached
>
> When I use ./isql select * from db.dba.load_list; I have 2091 nquads files
> to be loaded, and I am suppose to get around 727Mio triples.
>
> So this morning, I found these errors in virtuoso.log [1]. I can also
> realized from the /sparql endpoint that I have only 200Mio of triples in my
> dataset.
> I have used this script [2] to load the dataset.
>
> What do you think I am doing wrong?
>
> Thanks in advance for any help.
> Best,
> Ghislain
>
> [1] https://gist.github.com/gatemezing/2ff7fee59efca2978cadc28153cb3693
> [2] https://gist.github.com/gatemezing/d7df370f472bb43b851254be26721a45
>
> El lun., 6 feb. 2017 a las 17:57, Julien Plu (<
> julien@redaction-developpez.com>) escribió:
>
> Hello dear Ghislain,
>
> Replace all your "isql" by "./isql" otherwise you have to add your "bin"
> directory to your "PATH" environment variable. Check if this works and let
> me know :)
>
> Best.
>
> --
> Julien Plu
>
> PhD Student at Eurecom.
> Personal webpage: http://jplu.developpez.com
> FOAF file : http://jplu.developpez.com/julien
> Email address : julien@eurecom.fr && *plu.jul...@gmail.com
> <plu.jul...@gmail.com>*
> Phone : +33493008103 <04%2093%2000%2081%2003>
> Twitter : @julienplu
>
> 2017-02-06 17:50 GMT+01:00 Ghislain ATEMEZING <
> ghislain.atemez...@gmail.com>:
>
> Hello virtuoso-ers,
> I have a machine with 6C/12T with VOS 7.2.4. I wanted to run a script with
> multiple rdff_loader_run() for maximizing the speed of loading a billion
> RDF dataset [1]
> My script.sh looks like this
> https://gist.github.com/gatemezing/d7df370f472bb43b851254be26721a45
> However I try to run the script from the bin/ directory but I receive an
> error "isql: not found"
> Any hints on how to solve this?
>
> TIA
> Ghislain
> [1]
> https://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtBulkRDFLoader
>
>
>
> --
> ---
> "Love all, trust a few, do wrong to none" (W. Shakespeare)
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>
>
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[Virtuoso-users] Error 40001 SR...: Transaction deadlock Re: Running multiple loaders

[Ghislain ATEMEZING]

Hello list,
[ Now I start having issues when loading the dataset...].

I finally launched the script yesterday (thanks Julien) and this morning I
found that some data were not loaded due to some deadlocks.

== Some background on my hardware and virtuoso server==
  + RAM: 128 GB, 4 TO SATA, 6C/12T, Ubuntu 16
  + VOS 07.20 on Linux
  + My ini file is attached

When I use ./isql select * from db.dba.load_list; I have 2091 nquads files
to be loaded, and I am suppose to get around 727Mio triples.

So this morning, I found these errors in virtuoso.log [1]. I can also
realized from the /sparql endpoint that I have only 200Mio of triples in my
dataset.
I have used this script [2] to load the dataset.

What do you think I am doing wrong?

Thanks in advance for any help.
Best,
Ghislain

[1] https://gist.github.com/gatemezing/2ff7fee59efca2978cadc28153cb3693
[2] https://gist.github.com/gatemezing/d7df370f472bb43b851254be26721a45

El lun., 6 feb. 2017 a las 17:57, Julien Plu (<
julien@redaction-developpez.com>) escribió:

> Hello dear Ghislain,
>
> Replace all your "isql" by "./isql" otherwise you have to add your "bin"
> directory to your "PATH" environment variable. Check if this works and let
> me know :)
>
> Best.
>
> --
> Julien Plu
>
> PhD Student at Eurecom.
> Personal webpage: http://jplu.developpez.com
> FOAF file : http://jplu.developpez.com/julien
> Email address : julien@eurecom.fr && *plu.jul...@gmail.com
> <plu.jul...@gmail.com>*
> Phone : +33493008103 <04%2093%2000%2081%2003>
> Twitter : @julienplu
>
> 2017-02-06 17:50 GMT+01:00 Ghislain ATEMEZING <
> ghislain.atemez...@gmail.com>:
>
> Hello virtuoso-ers,
> I have a machine with 6C/12T with VOS 7.2.4. I wanted to run a script with
> multiple rdff_loader_run() for maximizing the speed of loading a billion
> RDF dataset [1]
> My script.sh looks like this
> https://gist.github.com/gatemezing/d7df370f472bb43b851254be26721a45
> However I try to run the script from the bin/ directory but I receive an
> error "isql: not found"
> Any hints on how to solve this?
>
> TIA
> Ghislain
> [1]
> https://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtBulkRDFLoader
>
>
>
> --
> ---
> "Love all, trust a few, do wrong to none" (W. Shakespeare)
> Web: http://atemezing.org
>
>
> --
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>
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[Virtuoso-users] Running multiple loaders

[Ghislain ATEMEZING]

Hello virtuoso-ers,
I have a machine with 6C/12T with VOS 7.2.4. I wanted to run a script with
multiple rdff_loader_run() for maximizing the speed of loading a billion
RDF dataset [1]
My script.sh looks like this
https://gist.github.com/gatemezing/d7df370f472bb43b851254be26721a45
However I try to run the script from the bin/ directory but I receive an
error "isql: not found"
Any hints on how to solve this?

TIA
Ghislain
[1]
https://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtBulkRDFLoader



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Re: [Virtuoso-users] Need help with GeoSparql reading GML values

[Ghislain ATEMEZING]

Hi Holly,
I am not sure to understand your question.
However, did you already have a look here
http://docs.openlinksw.com/virtuoso/rdfsparqlgeospat/#rdfsparqlgeospatcrg ?
Is your question is how to retrieve Geo coordites from GML?
You can also find some examples in the LinkedGeodata project here
http://linkedgeodata.org/OSM

HTH
Ghislain

El mié., 1 feb. 2017 a las 1:21, Holly Ferguson ()
escribió:

> Hello,
>
> Is there anyone who understands the formats that virtuoso geosparql
> functions need in order to use gmlLiteral geometry data in the distance and
> intersects functions?
>
> HF
>
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Re: [Virtuoso-users] Nice Query Sharing Service from LinkedWiki folks

[Ghislain Atemezing]

Hi Kingsley,
> Le 15 sept. 2016 à 00:45, Kingsley Idehen  a écrit :
> 
> The folks behind LinkedWiki have produced a great query sharing service [1].

Great! Good initiative indeed! 
> 
> I encourage everyone to share as many queries as possible. This is a
> very easy mechanism for demonstrating the virtues of SPARQL and Linked Data.

Just thinking: How can queries from http://yasgui.org/  
(e.g. [a] ) can talk to this LinkedWiki tool?


Best,
Ghislain 

[a] http://yasgui.org/short/BkRKgzOn 


Ghislain A. Atemezing, Ph.D 
R Engineer
@ Mondeca, Paris, France
Labs: http://labs.mondeca.com  
Tel: +33 (0)1 4111 3034
Web: www.mondeca.com 
Twitter: @gatemezing
About Me:  https://w3id.org/people/gatemezing 













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Re: [Virtuoso-users] Transaction error in lod cache endpoint

[Ghislain ATEMEZING]

Hi Hugh,
Thanks for looking into it...
Yes, that particular query works fine in Linkedgeodata endpoint.
However, if you change the point to be (2.92528, 47.38241) you get the same
issue. See query here [2]

Ghislain
[2] https://gist.github.com/gatemezing/633755c913287f5431f476046a902240

El mié., 17 ago. 2016 a las 19:29, Hugh Williams (<hwilli...@openlinksw.com>)
escribió:

> HI Ghislain,
>
> I get the same error, we are looking into it …
>
> Note the query does run against http://linkedgeodata.org/sparql
>
> Best 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/
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> Google+  -- http://plus.google.com/100570109519069333827/
> Facebook -- http://www.facebook.com/OpenLinkSoftware
> Universal Data Access, Integration, and Management Technology Providers
>
> On 17 Aug 2016, at 08:44, Ghislain ATEMEZING <ghislain.atemez...@gmail.com>
> wrote:
>
> Hi,
>
> I've just tried this query [1] in the LOD cache
> http://lod.openlinksw.com/sparql .
> Unfortunately I get this error: "Virtuoso 4000X Error SR176: Transaction
> rolled back due to previous SQL error"
> What I am missing?
>
> TIA
> Ghislain
>
>
> [1] https://gist.github.com/gatemezing/28ed5e8d01f65f32a818c433817412cd
> --
> ---
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>
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[Virtuoso-users] Transaction error in lod cache endpoint

[Ghislain ATEMEZING]

Hi,

I've just tried this query [1] in the LOD cache
http://lod.openlinksw.com/sparql .
Unfortunately I get this error: "Virtuoso 4000X Error SR176: Transaction
rolled back due to previous SQL error"
What I am missing?

TIA
Ghislain


[1] https://gist.github.com/gatemezing/28ed5e8d01f65f32a818c433817412cd
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Re: [Virtuoso-users] GeoSPARQL functions Support

[Ghislain ATEMEZING]

Hi Pasquale,
Try the examples in this link http://linkedgeodata.org/OSM. You'll find
results.

HTH
Ghislain

El jue., 28 jul. 2016 a las 12:55, Pasquale Di Donato (<
pasquale.didon...@gmail.com>) escribió:

> Hi Ghislain,
> many thanks for your answer.
> By the way the page you're mentioning doesn't resolv my doubts.
>
> First the last two examples, which are using geospatial query
> (bif:st_intersects) are not working: the first is giving no results, the
> last an error.
>
> Then I'm concerned with the geospatial functions. E.g. bif:st_intersect is
> defined in an openlink ontology (http://www.openlinksw.com/schemas/bif#)
> and are based as far as I can see on SQL MM.
> The GeoSPARQL functions are defined here:
> http://www.opengis.net/def/function/geosparql/. The GeoSPARQL function
> for intersect is
> http://www.opengis.net/def/function/geosparql/sfIntersects
>
> I don't understand if these GeoSPARQL functions are supported by Virtuoso.
>
>
> Pasquale
>
>
>
>
>
>
>
>
>
>
>
>
> On Thu, Jul 28, 2016 at 11:02 AM, Ghislain ATEMEZING <
> ghislain.atemez...@gmail.com> wrote:
>
>> Hi Pasquale,
>> Yes, I think you are missing something. The point is probably that you
>> are not using quite well the functions in your queries?!
>> Please have a look at this page
>> http://linkedgeodata.org/GADM which contains some sample queries for the
>> LinkedGeo data endpoint which powered by Virtuoso.
>>
>> HTH
>> Ghislain
>>
>> Sent from my iPhone, may include typos
>>
>> Le 28 juil. 2016 à 08:34, Pasquale Di Donato <pasquale.didon...@gmail.com>
>> a écrit :
>>
>> Dear list,
>>
>> yesterday I asked via a tweet @OpenLink is Virtuoso supports the
>> GeoSPARQL functions here defined:
>> http://www.opengis.net/def/function/geosparql/.
>>
>> Answer has been: "Virtuoso  supports much GeoSPARQL" today and I've been
>> redirected to the following page:
>> http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtGeoSPARQLEnhancementDocs
>>
>> In that page I see that geospatial queries are done via bif:something,
>> where all these bif:* are built-in SQL MM based functions.
>> Now if I do test with some GeoSPARQL functions, e.g. sfWithin, I get
>> error messages: meaninf IMHO that GeoSPARQL functions are not supported.
>>
>> Or am I missing simething?
>>
>> Ciao
>> Pasquale
>>
>>
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>>
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>>
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Re: [Virtuoso-users] GeoSPARQL functions Support

[Ghislain ATEMEZING]

Hi Pasquale,
Yes, I think you are missing something. The point is probably that you are not 
using quite well the functions in your queries?! 
Please have a look at this page 
http://linkedgeodata.org/GADM which contains some sample queries for the 
LinkedGeo data endpoint which powered by Virtuoso.

HTH
Ghislain 

Sent from my iPhone, may include typos

> Le 28 juil. 2016 à 08:34, Pasquale Di Donato  a 
> écrit :
> 
> Dear list,
> 
> yesterday I asked via a tweet @OpenLink is Virtuoso supports the GeoSPARQL 
> functions here defined: http://www.opengis.net/def/function/geosparql/.
> 
> Answer has been: "Virtuoso  supports much GeoSPARQL" today and I've been 
> redirected to the following page: 
> http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtGeoSPARQLEnhancementDocs
> 
> In that page I see that geospatial queries are done via bif:something, where 
> all these bif:* are built-in SQL MM based functions.
> Now if I do test with some GeoSPARQL functions, e.g. sfWithin, I get error 
> messages: meaninf IMHO that GeoSPARQL functions are not supported.
> 
> Or am I missing simething?
> 
> Ciao
> Pasquale
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Re: [Virtuoso-users] Combining Virtuoso with external OWL reasoners

[Ghislain ATEMEZING]

Dear Kingsley,

Thanks again for your input.

I understand the need for scalability here in the LOD context. And you are
making a great job for DBpedia and the LOD Cloud.

But what about this requirement?

I use a lot Virtuoso and now have to deal with an ontology in OWL DL, with
35 K subject instances. I want to be able to use a DL reasoner, like
Pellet. My workflow does not need sync (no live inference) at all. So I can
launch the inference as a batch from time to time. Furthermore, updates on
the dataset + onto are done every 2 months. How can Virtuoso helps here?
One could have expected to have in virtuoso.ini a way to call Pellet 2.3.1
(jars, classes, etc.) and then specify the named graphs (input and the one
to store the inferred result).

Could this feasible? And how?

 Best,
 Ghislain


2015-08-17 11:09 GMT+02:00 Kingsley Idehen kide...@openlinksw.com:

 On 8/17/15 9:30 AM, Ghislain ATEMEZING wrote:

 Hi Hugh,

 Thanks a lot for the pointer. I'll have a look and let you know.
 I am still really curious to see how it's feasible to integrate any
 external OWL reasoner with Virtuoso :)


 It hasn't been done due to lack of APIs that make very low-level DBMS
 integration possible. We have to have an option for reasoning and inference
 that scales. For instance, all the reasoning and inference functionality
 supported natively by Virtuoso scales from single-server instances (DBpedia
 static and live) all the way up to the 59 Billion+ live LOD Cloud cache we
 maintain.

 Delegating inference and reasoning to a 3rd part module or service comes
 with serious performance costs, at all levels of integration.

 Share some reasoner APIs and we can comment further about the specific
 interface, if need be.

 --
 Regards,

 Kingsley Idehen
 Founder  CEO
 OpenLink Software
 Company Web: http://www.openlinksw.com
 Personal Weblog 1: http://kidehen.blogspot.com
 Personal Weblog 2: http://www.openlinksw.com/blog/~kidehen
 Twitter Profile: https://twitter.com/kidehen
 Google+ Profile: https://plus.google.com/+KingsleyIdehen/about
 LinkedIn Profile: http://www.linkedin.com/in/kidehen
 Personal WebID: http://kingsley.idehen.net/dataspace/person/kidehen#this




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Re: [Virtuoso-users] Combining Virtuoso with external OWL reasoners

[Ghislain ATEMEZING]

Hi Hugh,

Thanks a lot for the pointer. I'll have a look and let you know.
I am still really curious to see how it's feasible to integrate any
external OWL reasoner with Virtuoso :)

Best,
Ghislain

2015-08-10 2:23 GMT+02:00 Hugh Williams hwilli...@openlinksw.com:

 Hi Ghislain,

 Virtuoso has its own built in inference and  reasoning engine supporting
 forward and back chained inferencing [1] .

 There was some work to integrate Virtuoso with Pellet some years ago but
 it was not completed and hence not released …

 [1] http://docs.openlinksw.com/virtuoso/rdfsparqlrule.html

 Best Regards
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 On 7 Aug 2015, at 11:35, Ghislain ATEMEZING ghislain.atemez...@gmail.com
 wrote:

 Hi Virtuoso-ers,

 Just a quick question in this list to know if there are pointers showing
 how to combine Virtuoso triple store with an external reasoner, such as
 Pellet [1] or any external reasoner.
 Any advice on how to combine Virtuoso with a reasoner will be highly
 appreciated.

 TIA
 Best,

 Ghislain

 --
 
  http://www.eurecom.fr/%7Eatemezin/Love all, trust a few, do wrong to
 none (W. Shakespeare)

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-- 

 http://www.eurecom.fr/%7Eatemezin/Love all, trust a few, do wrong to
none (W. Shakespeare)
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[Virtuoso-users] Combining Virtuoso with external OWL reasoners

[Ghislain ATEMEZING]

Hi Virtuoso-ers,

Just a quick question in this list to know if there are pointers showing
how to combine Virtuoso triple store with an external reasoner, such as
Pellet [1] or any external reasoner.
Any advice on how to combine Virtuoso with a reasoner will be highly
appreciated.

TIA
Best,

Ghislain

-- 

 http://www.eurecom.fr/%7Eatemezin/Love all, trust a few, do wrong to
none (W. Shakespeare)
--
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