https://www.datacenterknowledge.com/build-design/safer-under...
It's a severe engineering challenge to hide massive heat exchangers on the scale of the datacenters built in the industrial area near Dulles (coordinate example: 38.9817915,-77.417775). Find those on a map and observe the scale of their cooling and generator systems and then try to find anything comparable that's been built underground.
Just wanted to make the point you don’t have to pay to excavate the cave :)
edit: 61.9340107, 5.5084207 are the coordinates
https://new.abb.com/news/detail/5924/abb-solutions-power-eur...
There are mines with plenty of space in them, and heat removal can be done with water cooling. But who is going to pay 50% more for that when it isn't needed 99.99% of the time?
Huh? The ones I know of have plenty of connectivity. The real issue is your first, that people prefer to just put their stuff in two countries over paying premium for having their servers under ground.
Although I personally would expect some sort of decentralisation option to be more effective. It's difficult to even theorise because we don't know exactly what sort of damage these strikes are doing and what countermeasures are already in place. If this strike has caught Yandex by surprise after almost 5 years of hot war then they really should hire a dude to check up on current events every so often. They must have some sort of contingency planning around a Ukrainian strike.
But yeah, the economic incentives are creating unicorns and centralizing compute/capital/etc.
So you build your stuff inside a mountain and run a bunch of big ass liquid cooling loops to heat exchangers in the atmosphere outside the mountain. The requirement of the cooling system being out in the open air means it can also be hit by air strikes, an adversary doesn't need to penetrate the mountain, just take out its cooling.
You'd have to build a fully underground cooling system that goes to a nearby river (or huge lake) and use the cold water from that, which would get costly quick.
Helsinki gets its water from the 120 km Päijänne Water Tunnel, which cost €200-250 million (adjusted for inflation) to build. Peak flow is 10 m^3/s by gravity alone and up to 20 m^3/s with pumps, which should be enough to cool a 1 GW data center. You could increase the cost by 2x (because real wages have gone up), by another 2x (because middlemen have destroyed productivity), and by yet another 2x (because everything is more expensive in America), and it would still be pretty reasonable.
Musk comes up with a crazy idea.
Investors, "analysts" and sycophants go to great lengths to defend it.
Rational people wonder if everyone is losing their mind.
Musk profits.
Recall that while he managed to hire the right people to get reusable rockets cheap enough for Starlink, it was also the case that in 2016 he said that SpaceX was aiming to use the 2018 Mars launch window for what is now Starship, and also that some time around 2018 it would be possible to summon your Tesla car from the other side of the country and it would find its way to you autonomously and only stop for charging.
Hyperloop was stupid and failed, and it also killed in a few places development of public transport, which of course means people continue to buy cars.
Edit: I guess the scale isn't comparable to a, for example, Google data center though.
[1] https://www.ironmountain.com/data-centers/colocation/our-dat...
[2] https://betterbuildingssolutioncenter.energy.gov/showcase-pr...
https://www.reuters.com/business/media-telecom/russian-satel...
Do you need many acres of land to host a heat exchanger?
Dont know why i can't reply to the person commenting below. But where's the statistics? Who has these datacenters out in the field?
https://www.google.com/search?client=firefox-b-d&q=london+un...
You could probably drill sideways into rocks and pump heat into the mountain for a certain period of time, but on a multi-month or year time scale, it would catch up with you after you had saturated it.