Multiple FreeRadius servers with one PostgreSQL backend

Hello everyone. I'm trying to create a horizontally scalable VPN service: a lot of IPSEC nodes with FreeRadius server for EAP-auth and accounting. FreeRadius backend is a PostgreSQL server. The question is: "Is it possible to run multiple freeradius services (one on each VPN gateway) with one backend server?" It makes a configuration a really much easier, because I do not need to care about separate radius server performance/scaling and failover - each VPN node has its own server. Best Regards, Ruslan.