Understand the difference between graph querying and graph processing. If you have a question like, “give me all the friends of friends of person X that share a college”, then that’s a query that a graphdb would be helpful for. Saying, “find clusters of nodes based on relationships of types x, y, and z” is a processing job. You might need to query the graphdb to get the graph data that’s then loaded into a graph processing engine.

So be clear on exactly what you’re trying to do.