Re: We use Orchestrator
Ive had fewer brown trouser moments BECAUSE of clustering my resources. We arent large scale but we do use MS clustering, it has kept things going with the core switches wents down due to faulty UPS, clustering on 2nd site failed over nicely and replicated storage back when we fixed the UPS. SQL server has failed over when spod accidentally triggered an update that rebooted one of the custers - this was a "nice" failover but worked just as well.
big boys tend to have bigger problems though.