Hard to use beam, need more details

[shanghai-Jerry]

i must say it's hard to use it, more documents about beam are strongly recommended for users.

for this point, dgraph is much better. Cause i know how to deploy my own distributed dgraph system, althought it's not faster to load data through grpc interface, but i think beam has the same problems.

what's more, i can not even find a way to load large rdf files, that's too bad.