> Do you have any information about the model you use to store RDF > efficiently and any performance numbers? Esp. comparing it with cypher? > That would be really interesting. > The plugin is based on the blueprints framework and the "SAIL Ouplementation <https://github.com/tinkerpop/blueprints/wiki/Sail-Ouplementation>". A RDF triple is mapped as a directed edge. All information is stored in the properties. So e.g. a URI node in RDF <http://example.com> is mapped as ({kind: "uri", value: "http://example.com"; }). The URI of an edge is represented as type of the edge in Neo4j. The mapping does not use labels on nodes.
I tested performance against the Fuseki <https://jena.apache.org/documentation/serving_data/> Graphstore with different sizes of datasets. Unfortunately the RDF mapping has its drawbacks, because Neo4j needs much more space than Fuseki. The largest dataset I tried was 17.9 GB in n-triples format. Fuseki uses ~ 9 GB disk space after import, but Neo4j allocated 390 GB. That also results in about 27 times slower query execution on this large dataset. Using the smallest dataset with just 2 MB Neo4j is just 2.4 times slower than Fuseki. I used the "Berlin SPARQL Benchmark <http://wifo5-03.informatik.uni-mannheim.de/bizer/berlinsparqlbenchmark/>" for testing. Do you have any examples for rdf / turtle import using the plugin? > Yes, on the GitHub <https://github.com/niclashoyer/neo4j-sparql-extension#sparql-graph-protocol> page there is an example for turtle import using curl. A PUT request to the graph resource will replace all data in the graph: $ curl -v -X PUT \ localhost:7474/rdf/graph \ -H "Content-Type:text/turtle" --data-binary @data.ttl > And if you had a blog post, we could help you promote the plugin and also > link it from our website. > Yes, I don't have a blog post yet. I'll come back to you as soon as I've got something. > Where are you located? > Kiel, Germany. Regards, Niclas -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
