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graphLoader

This script loads graphs under separate named graphs in Virtuoso 7.0.0.

First, you need Virtuoso. Assuming you don't have it just follow the steps from the beginning. It's a Mac OS X installation.

You can skip Homebrew and Virtuoso installations if you already have them installed.

##Homebrew installation

Download the latest version of the Homebrew though its official website Easiest way would be to just use the following command in the terminal

$ ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"

Then run brew update to make sure there are no updates available and if there are it will update it.

$ brew update
#Then you can check the status of the installation by running the following command.
$ brew doctor

##Virtuoso installation

  1. install Virtuoso

brew install virtuoso

  1. go to virtuoso.ini and change couple of values there:
cd /usr/local/Cellar/virtuoso/7.0.0/var/lib/virtuoso/db
vim virtuoso.ini

Change the following values and save the file:

[Parameters]
NumberOfBuffers = 340000
MaxDirtyBuffers = 250000

[Database]
MaxCheckpointRemap = 625000

[SPARQL]
MaxQueryCostEstimationTime = 4000 ; in seconds
MaxQueryExecutionTime = 600 ; in seconds

  1. Download rdfloader.sql from this repository and place it in /usr/local/Cellar/virtuoso

  2. Start the server

cd /usr/local/Cellar/virtuoso/7.0.0/var/lib/virtuoso/db
virtuoso-t -f &
  1. Go to http://localhost:8890 > Conductor > and type a standard username: dba and password: dba

LOAD graphs to Virtuoso

  1. Go to loadToVirtuoso.sh script and change a path to a folder where all the files are stored. Save it.

  2. Make the file executable: chmod +x loadToVirtuoso.sh

  3. Run script ./loadToVirtuoso.sh

  4. Go to http://localhost:8890/sparql and check if your graphs are properly added

SELECT ?g COUNT(*) { GRAPH ?g {?s ?p ?o.} } GROUP BY ?g ORDER BY DESC 2

Works? So you did everything right :)