Running Virtuoso

In the following we assume that you want to run Virtuoso on the knowledge base Fbeasy. To run on one of the other knowledge bases, replace fbeasy by freebase or wikidata in all the commands below.

Download the corresponding index files (use the following command, alternatively they are linked on the main page).
```
wget https://qlever.cs.uni-freiburg.de/cikm2022/virtuoso-fbeasy-index.tar
```
Extract the index files
```
tar xvf virtuoso-fbeasy-index.tar
```
Make the folder read- and writeable for everyone (you need at least read and write permissions for the Docker user) and enter it.
```
chmod a+rwx virtuoso-fbeasy-index 
chmod a+rw virtuoso-fbeasy-index/*
cd virtuoso-fbeasy-index
```
Pull the Virtuoso Docker Image and run it.

This assumes that the ports 1111 and 8890 are free on your machine. Otherwise, change the outgoing ports to available ports (replace the corresponding number before the colon in the following command).
```
docker pull openlink/virtuoso-opensource-7
docker run -dt -e DBA_PASSWORD=dba -p 1111:1111 -p 8890:8890 -v $(pwd):/database --name virtuoso openlink/virtuoso-opensource-7
```
To check the startup process of Virtuoso you can use docker logs
```
docker logs -f virtuoso
```
After a few seconds the server should be ready (the log says 'Server Started'). You can check this by entering http://localhost:8890/sparql (adapt to your changed port if necessary). You should see a simple Sparql interface. You can enter the following query:
```
SELECT COUNT(*) WHERE { ?s ?p ?o }
```
It should report over 300 Million triples (Virtuoso always adds some internal triples, so the exact number might slightly vary). For Freebase and Wikidata the number of Triples should be 1.9 Billion (Freebase) and 6.9 Billion (Wikidata).

If this doesn't work, also try 172.17.0.1 (Docker's virtual network bridge) instead of localhost, depending on your Docker configuration.
The Virtuoso-Fbeasy instance is now ready. You can run the evaluation script as described in the respective tutorial.