[sefrost]

Under Designated Services:

> Sites with a continuous manufacturing process, not sustainable through BEIS standby generation, where regular shutdown for 3-hour periods is not possible and would cause significant financial damage

I wonder if this includes Agile offices, it seems like a broad definition!

[AngusH]

:-)

Very broad indeed, though I think it's just qualification for asking, not grounds for acceptance, (thankfully)

One thing I'm curious to know is what it's like on the distribution side though, getting these requests and then approving them (or not)

I wonder if they only get serious requests (say steel mills and hospitals) or if they also get requests from non-essential businesses who shouldn't be on the list?

Most data centers should have back up power, so the question of whether Facebook, Twitter and Amazon get cut off probably doesn't need to be asked.

[bombcar]

Datacenters often have agreements to shed load in emergencies - I was working on a machine inside a datacenter in San Diego when they announced that SDGE had asked them to throw to generator as the load was too high. This was back in the Enron days.

If you've never been in a secure datacenter when they throw, it's fun.

[dotancohen]

  > If you've never been in a secure datacenter when they throw, it's fun.

I find your ideas intriguing and would like to subscribe to your newsletter.

Seriously, though, do tell us more.

[bombcar]

So the one I was in had these massive rooms full of lead-acid batteries, and 3 or 4 multi-megawatt "generators" outside (located at various sides of the building, not all in one place).

They announced it over the PA because it was a planned transfer - and then all the "normal" lighting went off (think overhead fluorescents) at the same time the emergency lighting came on - the power to the servers and anything plugged into the racks didn't even flicker, of course.

There was a huge thunking sound from somewhere (I assume something disconnecting from grid power) and the muted roar of the generators starting. A few moments later, the main lights came back on.

It was an entirely different experience than a normal power failure, where everything goes quiet - you knew something happened, but other than that it all worked smoothly.

[chasd00]

if you're into datacenter drama you may find this interesting. It's a livejournal of a datacenter in downtown New Orleans riding out Hurricane Katrina and all the crazyness they went through to keep things online in the aftermath. Comes complete with snipers, rolling barrels of fuel up parking garages, raiding snack machines, the whole enchilada.

https://interdictor.livejournal.com/2005/08/29/

[selimthegrim]

(In)famously, they were SomethingAwful's hosts (you can see a reference to this on one of the Sep 1 posts)

[tomxor]

That is not a manufacturing process. Pretty sure they are referring to time sensitive operations where halting a manufacturing process causes substantial losses due to the overhead of starting and stopping that process and probably losses due to waste that cut much deeper than mere losses in profits... maybe also to do with the affect on supply consistency to their customers.

(Regularly) shutting down such operations could quite realistically bankrupt them.