Comment by rbanffy
14 hours ago
The more dramatic contingency you have to plan for, the more expensive the plan gets.
Earlier this week I mentioned that if we lose enough data centres to bring our operation down, the first items in the to-do list becomes securing weapons, vehicles and fuel.
> to-do list becomes securing weapons, vehicles and fuel.
I toured a datacenter once back in the early 2000s and they showed me 30 days of generator fuel storage. When i asked them why 30 days and not 35 they replied "we're such a major customer of both electricity and fuel that if we don't get electricity or fuel for 30 days there's way bigger problems than your website not being online" hah.
I had a similar discussion in the low 1990s at a large electronic manufacturer that had a pair of Unisys mainframes, one in São Paulo and another in Manaus, in the Amazon region communicating over a satellite link (two large 3m dishes on both places). There was one question of what happens if both fail at the same time, and I pointed that anything that takes out São Paulo and Manaus at the same time is a civilisation ending event, and we shouldn’t worry too much about that.
Anyway, we had a load shedding agreement with a large bank across the street from São Paulo and we could switch over to their Unisys mainframe in a matter of minutes, and vice versa.
You also need to understand whether the generator backup actually runs everything. Where I work it doesn't. Only "essential" systems get backup power.
And if the data center is more than about 5 years old it almost certainly was not planned with adequate backup power to run racks of GPUs.
That's probably already true for 7 days or less
Large storms regularly result in some customers with lack of utility power for more than 7 days for some customers. When storms take out major transmission lines and roads and bridges, you can end up with some pretty lengthy outages, and fuel deliveries will also be difficult.
Look at data center responses from Hurricanes Katrina and Sandy. This guy [1] was onsite for Katrina. Lost utility power on August 29. They did have some access to fuel on Sep 1, but pretty spotty until maybe the 3rd. Looks like power started coming back in some places Sep 8, and maybe widely restored on Sep 14th.
I would say, by 7 days in you'll probably have a good idea of if 30 days might not be enough.
[1] https://web.archive.org/web/20061206181753/http://interdicto...
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7 days of unreliable electricity wouldn't be unheard of for a very large storm
I had the same discussion with a manager about the backups of financial contracts for cleaning school facilities.
He just couldn't get past the notion that if the six copies in four buildings across two states were all simultaneously physically destroyed, then most likely there are also no more schools left standing, and hence the contracts to clean them are null and void. Also, payment is now in booze and ammunition, not dollars.
"Daddy, where were you when the flames reached our house?"
"I was in the office, reviewing Terraform plans"