Neo4j vs OrientDB vs Titan I am working on a data-science project related on social relationship mining and need to store data in some graph databases. Initially I chose Neo4j as the database. But it seams Neo4j doesn't scale well. The alternative I found out are Titan  and oriebtDB. I have gone through this comparison on these three Databases, But I would like to get more details on  these databases. So Could some one help me in choosing the best one. Mainly I would like to compare performance, scaling, on line documentation/tutorials available, Python library support, query language complexity and graph algorithm support of these databases. Also is there any other good database options ?
I think you might have to keep overall Data pipelines and Machine learning pipelines in mind. For which you need a robust framework to move data between table like and graph like storage apart from powerful distributed processing. From my understanding Spark GraphX is promising to build these pipelines. Joseph Gonzalez's (one of the creator of GraphLab from CMU) talk on GraphX on youtube is worth watching.