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Re:Feeding Graph databases – a third use-case for modern log... by david_p on Thursday December 31, 2015 @04:27AM (#10816945)
To my knowledge, Neo4j has been working on performances a lot. Neo4j v2.2+ does a much better job with large-scale graphs.

The use-case you describe (a couple million nodes + edges) sounds like a fairly reasonable task for Neo4j.

If Neo4j has been a bad experience for you, I also recommend looking into TitanDB v1+, which scales horizontally (backed by Cassandra), although the query language (Gremlin) is not as easy to learn as Cypher.

Re:Feeding Graph databases – a third use-case for modern log... by amirouche on Thursday December 31, 2015 @09:22AM (#10817633)
not sure about Cypher being easier than Gremlin.