It's been a while since I've done anything with data centers, but I can't think of a single reason one would bother with hibernating a datacenter server. Even

It's been a while since I've done anything with data centers, but I can't think of a single reason one would bother with hibernating a datacenter server. Even dynamic VM load stuff (think a cluster of machines supporting 1000 VMs that can migrate, turn machines on and off based on load) just shuts down machines, as far as I know. You might get some benefits from sleep if you need rapid wake (5-10 minutes for a big server booting from power off isn't uncommon), but... eh. I don't know anyone messing with that stuff at scale, for sure.