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Comment by CuriouslyC

4 days ago

Honestly, data centers in the ocean make so much more sense than data centers in space it's kind of silly, but Mr Moneybags owns a rocket company he's trying to pump and dump, not a submarine company, so here we are.

It's like the idea of Mars as a backup to human civilization. The technology required to make Mars livable and independent from Earth is so advanced it would allow you to survive basically anything here on Earth already.

I would suggest data centres near the arctic - it's close to most of the Northern hemisphere's users, presents an easy option for cooling (the place is a heat sink), and, with collapsing glaciers, there will be abundant hydro power to be used.

It has the killer feature of allowing a human to walk up to a rack and replace a component.

  • A problem with the arctic, is that infrastructure becomes a problem the longer north you go. Even in western countries like Norway, the power grid is simply too small to handle any data center in the northern-most counties. Not to mention the political issue, where those living there would face higher utility bills.

    It is assumed that if you want to build lots of data centers up north, you also need to invest in infrastructure. I've seen discussion about smaller modular nuclear power plants, but those things take years. Another thing could be other renewable energy sources.

  • One huge advantage of ocean data centers is that you can do geothermal down there more cheaply and easily, and it's a very consistent source of power, so you don't even need hydro. Additionally, deep ocean water is consistently very near freezing, you could get below freezing out of the water but then you lose conduction efficiency.

    The replacability is nice, but even in terrestrial data centers there are situations where something fails and it never gets replaced, just routed around, until the pod gets ripped out and replaced in its entirety.

  • NIMBY stuff is an issue too, I live in AK and would love if we started building them, but there are infrastructure problems and then people who have never worked in the arctic frantically pitching a fit about caribou they’ve never seen.

    NIMBY stuff is why we will go to space. In space nobody can tell you “no.”

  • >I would suggest data centres near the arctic - it's close to most of the Northern hemisphere's users, presents an easy option for cooling (the place is a heat sink), and, with collapsing glaciers, there will be abundant hydro power to be used.

    Advocating for exacerbating the melting of the polar ice cap, which will endanger dozens of millions of people, just to have more convenient data centers for manufacturing AI slop, is peak HN.

    • If they are going to build them, they might as well build them in a place that could use extra power and where cooling would use less energy.

    • stackghost, if they use less cooling power, how is that exacerbating melting ice caps? And how is making use of a resource supposed to condone the actions that brought it about? Is arctic hydropower morally unclean or something? Your "peak HN" might have a little backfire to it.

      Thanks for inspiring a little fun with the "peak HN" meme:

      https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...

A startup I worked at is building wave-powered data centers [1].

1: https://www.latitudemedia.com/news/catalyst-building-inferen...

  • Huh. I thought the field had mostly soured on wave power due to the incredible engineering challenges. Cheaper+easier to do wind or solar. I guess you can slap “For AI” onto anything to overcome the economics.

    • They have a unique design where only a turbine moves with very cheap electricity produced.

      AI inference gives them a great way to turn revenue from cheap electricity without solving the device-to-shore problem yet for that energy.

I know Microsoft tried it. They had a press release saying it was successful but never did it again. Does anyone know more about that? I agree with you that data centers in the ocean seem a better bet.

Corrosion is one hell of a problem in salt water.

I think the specific attraction to space is the copious massive amounts of free solar energy, isn't it?

(In reality, they want to build the torment nexus at the Lagrange points because that would just be edgy-as-fuck)

  • > I think the specific attraction to space is the copious massive amounts of free solar energy, isn't it?

    Yes you get more energy harvest from solar above the atmosphere and can orient them to always be pointed towards the sun. But it is still so much more expensive than building out conventional solar in the Sun Belt, which is so much more expensive than just building a massive natural gas plant right next to people's homes.

    No, space is desirable because there is no local permitting authority that can push back. People living near data centers have gotten wise to the fact that local people pay most of the externalities of data centers and AI, but the benefits mostly go elsewhere, and the jobs created during construction are temporary. In space, you don't have to lobby/bribe local politicians and astroturf a YIMBY movement.

    • > People living near data centers have gotten wise to the fact that local people pay most of the externalities of data centers and AI, but the benefits mostly go elsewhere.

      That's true of just about every industrial, commercial, civic, or residential site. It's the fundamental premise behind every NIMBY protest ever. The benefit of each individual site always runs disproportionately to people further away. It's only in the aggregate, i.e. each individual enjoying the cumulative externalized benefits from far-off, that the equation could ever balance.

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  • That is a problem, but you already have to contend with GPU refresh every ~6 years, it's likely you'd pre-build pods that you could sink and link, then you'd float them and refurbish at refresh time. With that cycle time it's a manageable engineering challenge.

What’s the regulatory path to something like this? Oceans seem to have all the problems of land except manifold: permitting is nigh impossible, and power is hard to line up.

To make it worse, underwater tech is notoriously hard to make operationally visible. Sabotage is trivial and undifferentiable from failure and honest error. When we used to work in trading subsea cable cuts in Asia would constantly ruin our best networks. Everyone had point to point microwave expressly because it wasn’t breakable in this way. Exposing compute to this rather than just networking would have doomed the entire enterprise.

  • No permits needed in international waters, and PV arrays work fine there.

    He should look at renting space on container ships before considering orbital DCs, IMO. But that doesn't satisfy the critical "Rocket company needs something to do" constraint.

    • There was one barge DC from Nautilus[0]. The problem was to get the amount of power they needed shore power, and fiber from there. Undersea is absolutely crazy to me. But surface vessels are interesting. I wonder what you do: tie a massive gas tanker to a powership (ocean sees night - space doesn't) and then put a container ship full of chips nearby? International waters aren't that far off, so you could reasonably run a fiber line back to shore for interconnect but to get actual full decoupling, I suppose you'd use Starlink.

      Sounds terrific actually haha. Boy would that be a sight to behold.

      0: https://www.datacenterdynamics.com/en/news/nautilus-puts-sto...

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