AFAIK there's no explicit limit per se - the BDR developers tested it with 48 nodes, but it will work with more nodes. But there are things you'll probably run

AFAIK there's no explicit limit per se - the BDR developers tested it with 48 nodes, but it will work with more nodes. But there are things you'll probably run into - for example this only supports full mesh topology, i.e. each node speaks to every other node. So the more nodes you have, the higher the number of management connections.