Amazon ran into this exact problem with Perforce. They threw hardware at the problem for a while but, fortunately, soon realized that they weren't getting anywh

Amazon ran into this exact problem with Perforce. They threw hardware at the problem for a while but, fortunately, soon realized that they weren't getting anywhere with that. They were trying to work "with" git i.e., with one repo per service and were in migration phase when I left.