Local and Distributed Traversal Engines
Marko Rodriguez on graph traversal engines:
In the graph database space, there are two types of traversal engines: local and distributed. Local traversal engines are typically for single-machine graph databases and are used for real-time production applications. Distributed traversal engines are typically for multi-machine graph databases and are used for batch processing applications. This divide is quite sharp in the community, but there is nothing that prevents the unification of both models. A discussion of this divide and its unification is presented in this post.
If you are interested in graphs and topic maps, definitely an effort to watch.