Recovering From a Service Failure?

The goal of this set up is to be able to recover quickly from a serve hardware failure or a major human error. Mike, who is also a patron and skipped the cue, writes: i have a small install two servers that i run prox mox ve on, using xedipes for the storage. Prox mox has the ability to cluster using the coro sink engine. I'm wondering if that is the best way to keep the v ms in sink between the two physical hosts? Or if best option is to use syncoid and sanoid to keep the data sets in zinc between the machines and manually handle the fal ove when it happens.