Aerospike GraphSynth is a high performance parallel synthesizer for graph-structured data.
GraphSynth takes a Schema Graph and a Scale Factor and emits a Graph fitting the input Schema, scaled to Scale Factor size
You can find some examples of writing to a TinkerPop Graph or writing to a directory of CSV files.
A tutorial on writing a Schema can be found here
NOTE: GraphSynth is intended for testing and pre-production environments. It is not recommended for production operations.