I'm in the midst of 'stress testing' at work. Essentially, we make a bunch of computers pretend to a load of human users, and we point them at a load of computers we're actually trying to deliver. The idea is that we get to see how our systems perform when lots of people use them.
Anyway, no matter who does this, no matter how much they try, it always goes wrong. That's not to say it always goes badly, it just doesn't go according to plan. That's where we are right now, the plan's literally out the window, and we're making it up as we go. We're making progress, but it's long days and weekends at work. As such, it's not just the computers that get stressed.
On the plus side, a number of people in a company that my employer works for have told me what a great job I'm doing. That feels good - stuff like "we couldn't do it without him" reminds me just why I'm working all the hours and dealing with all the stress. Cheers!