Well, Powerset's current frontend manages over 2^9's cores, which is even more processes to monitor and route traffic to. Fuzed manages about a 3rd of these and ensures that they are up and traffic is rerouted in the event that the C code that constitutes our NL analysis crashes or consumes too much memory (it can), or a machine drops, or a nic crashes.
Fuzed is cool for this, and a big win for Powerset, because you can scale as you go, you can very nearly just drop more hardware in with practically no global configuration. Search Engines are a special case of websites because they have to scale very broad, very early.
But Fuzed is useful and usable from one box to hundreds, and it's idea for dynamic environments like EC2 where you need to stay very light on your feet to minimize cost. That's originally why I wrote it.
The nagging voice at the back of my head asks if this is a case of scaling your architecture before you need to?