Last month I wrote an article about graph database for CG productions. I explored three technologies: CayleyDB, Neo4j, ArangoDB. It appeared that Arango was the most user-friendly and that Neo4j was faster and more featured.
I made my tests with a simple example with few data. I would be glad to know your experience with Graph databases: what problems you solved with it and how good it performed.
The article I mentioned before:
https://medium.com/@cgwire/cg-pipeline-the-best-graph-database-for-your-cg-production-data-4cedc9e49065