Re: [dotNetRDF-Support] reading owl into a virtuoso triple store

[Rob V. <rv...@do...>]

Yes, use the Handlers API [1], specifically you want to use the
WriteToStoreHandler [2].  You may need to play with the batch size to get
good performance since the default is pretty low (1000), you may want to use
something more in the 10-50,000 range

Also bear in mind that if your data has a lot of blank nodes you'll still
need a lot of memory because blank node containing triples have to be stored
up and written in one single batch at the end to ensure blank nodes are
correctly stored.

Rob

[1] https://bitbucket.org/dotnetrdf/dotnetrdf/wiki/UserGuide/Handlers%20API
[2] 
http://www.dotnetrdf.org/api/index.asp?Topic=VDS.RDF.Parsing.Handlers.WriteT
oStoreHandler


From:  "Bahador(reza)? OFOGHI" <br_...@ya...>
Reply-To:  "Bahador(reza)? OFOGHI" <br_...@ya...>
Date:  Wednesday, July 31, 2013 4:35 PM
To:  Rob Vesse <rv...@do...>, dotNetRDF User Help and Support
<dot...@li...>
Subject:  SPAM-HIGH:  Re: [dotNetRDF-Support] reading owl into a virtuoso
triple store

> Thanks, I have now installed an instance of Vicrtuoso and I am able to put
> small OWL files into a triplestore. However, the main owl file I am working on
> is of the size +750MB and I am getting out of memory exceptions to load the
> file into the graph before trying to save it on this line
> FileLoader.Load(g, "myFile.owl");
>  
> Is there any way to bypass loading this huge file into memory before pushing
> it into a triplestore?
>  
> thank you again.
>  
> 
>   
>  
>  
>  
>    From: Rob Vesse <rv...@do...>
>  To: Bahador(reza)? OFOGHI <br_...@ya...>; dotNetRDF User Help and
> Support <dot...@li...>
>  Sent: Thursday, 1 August 2013 5:55 AM
>  Subject: Re: [dotNetRDF-Support] reading owl into a virtuoso triple store
>   
>  
> 
> The request for a path to VirtuosoManager.cs is the debugger trying to break
> into the source code but being unable to locate it on your machine and can be
> safely ignored.
> 
> The error that you are getting indicates that Virtuoso is not running, you
> need to actually have an instance of Virtuoso installed and running on your
> machine.
> 
> Virtuoso is a 3rd party product so you should follow their instructions to
> download, install, configure and run Virtuoso appropriately
> 
> Rob
> 
> From:  "Bahador(reza)? OFOGHI" <br_...@ya...>
> Reply-To:  "Bahador(reza)? OFOGHI" <br_...@ya...>, dotNetRDF User Help
> and Support <dot...@li...>
> Date:  Tuesday, July 30, 2013 6:56 PM
> To:  "dot...@li..."
> <dot...@li...>
> Subject:  [dotNetRDF-Support] reading owl into a virtuoso triple store
> 
>> Hi,
>>  
>> I have just started working with virtuoso. I am simply trying to read an OWL
>> file into a virtuoso triple store using the following few lines of code:
>>  
>> Graph g = new Graph();
>> FileLoader.Load(g, "myFile.owl");
>> virtuoso.SaveGraph(g);
>> First time I ran the code I was asked for a path to VirtuosoManager.cs file
>> which I just cancelled! But then, I get the error "No connection could be
>> made because the target machine actively refused it 127.0.0.1:1111" everytime
>> I run the code. I wonder what I need to do to get this to run correctly and
>> put the OWL file into a virtuoso triple store?
>>  
>> thanks,
>> bo
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> 
> 
>  
>  
>