Unless I'm missing something, I would assume they run magicd on all servers that run the application. Thus Riak's degree of redundancy is independent of magicd's degree of redundancy since each instance of magicd can communicate to the entire Riak pool.
Yep! This is exactly how it works. Each app node runs a magicd which connects to an haproxy instance on localhost (connected to every machine in the database cluster), so when a Riak node goes down we don't miss a beat.
