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Datacenters in space aren't going to work

taranis.ie

181–190 of 447 posts

Re: Datacenters in space aren't going to work

#181
post #120

Datacenters in space is about circumventing nation states masked as ambitions to generate more power. Follow the rationale: 1. Nation states ultimately control three key infrastructure pieces required to run data centers (a) land (protected by sovereign armed forces) (b) internet / internet infra (c) electricity. If crypto ever became a legitimate threat, nation states could simply seize any one of or all these three…

https://en.wikipedia.org/wiki/Anti-satellite_weapon

My favorite F-15 kill:

https://en.wikipedia.org/wiki/ASM-135_ASAT

Re: Datacenters in space aren't going to work

#182
post #120

Datacenters in space is about circumventing nation states masked as ambitions to generate more power. Follow the rationale: 1. Nation states ultimately control three key infrastructure pieces required to run data centers (a) land (protected by sovereign armed forces) (b) internet / internet infra (c) electricity. If crypto ever became a legitimate threat, nation states could simply seize any one of or all these three…

Putting data centers on ships in international waters would be just as effective at evading government control (i.e. not very) while being orders of magnitude easier and cheaper to build and operate.

They've always been able to do this.

Microsoft was talking about submarine data centers powered by tidal forces in the early 2000s.

There have been talks of data centers on Sealand-like nation states.

Geothermal ...

Exotic data center builds will always be hyped. Always be within the realm of feasibility when cost is no object, but probably outside of practicality or need.

Next it'll be fusion-powered data centers.

Re: Datacenters in space aren't going to work

#183
post #120

Datacenters in space is about circumventing nation states masked as ambitions to generate more power. Follow the rationale: 1. Nation states ultimately control three key infrastructure pieces required to run data centers (a) land (protected by sovereign armed forces) (b) internet / internet infra (c) electricity. If crypto ever became a legitimate threat, nation states could simply seize any one of or all these three…

This is the only "advantage" I can see with space-based datacenters. Crypto will remain a joke but putting devices beyond the reach of ground-based jurisdictions is a libertarian dream. It will probably fail - you still need plenty of ground infrastructure.

Re: Datacenters in space aren't going to work

#185

There are 8,000+ Starlink satellites in orbit right now. Each one has about 30 square-meters of solar panels. That's 240,000 square meters. ISS has 25,000 square meters, so SpaceX has already launched almost 10-times the solar panels of ISS. The next generation Starlink (V3) will have 250 square meters of solar panels per satellite, and they are planning on launching about 10,000 of them, so now you're at 2.5 million…

> The only one that might apply is cost: if it's cheaper to build data centers on Earth, then space doesn't make sense (and it won't happen). So the only problem left to be solved is that space datacenters would be millions of times more expensive per unit of compute than a ground based datacenter. And cost millions of times more to maintain.

Starlink cost maybe $10 billion. A 100,000 gpu data center costs between $20 and $40 billion to build.

Also remember that data centers last for about 5 years; after that the gpus are obsolete. That’s no different than the lifetime of a Starlink satellite.

Re: Datacenters in space aren't going to work

#186

One thing I haven't seen talked about at all: how quickly would space heat up? I presume Earth's gravity largely keeps the exosphere it has around it. With some modest fractional % lost year by year. There is a colossal vast volume out there! But given that there's so little matter up in space, what if any temperature rise would we expect from say a constant 1TW of heat being added?

The sun’s radiation hitting earth is 44,000 terawatts. I think we’re fine with an “extra” terawatt. (It’s not even extra, because it would be derived from the sun’s existing energy.)

https://www.nasa.gov/wp-content/uploads/2015/03/135642main_b...

Re: Datacenters in space aren't going to work

#187

There are 8,000+ Starlink satellites in orbit right now. Each one has about 30 square-meters of solar panels. That's 240,000 square meters. ISS has 25,000 square meters, so SpaceX has already launched almost 10-times the solar panels of ISS. The next generation Starlink (V3) will have 250 square meters of solar panels per satellite, and they are planning on launching about 10,000 of them, so now you're at 2.5 million…

At what price per MW of load?

The Starlink constellation cost $10 billion. That’s comparable to a small data center (maybe 50,000 gpus).

If launch costs keep dropping and environmental costs keep rising, space based data centers will make sense.

Re: Datacenters in space aren't going to work

#188

There are 8,000+ Starlink satellites in orbit right now. Each one has about 30 square-meters of solar panels. That's 240,000 square meters. ISS has 25,000 square meters, so SpaceX has already launched almost 10-times the solar panels of ISS. The next generation Starlink (V3) will have 250 square meters of solar panels per satellite, and they are planning on launching about 10,000 of them, so now you're at 2.5 million…

The facts you quoted just made me even more convinced that space-based datacenters will not be cost effective any time soon. If an entire generation of satellites costing many billions of dollars can't power more GPUs than a single terrestrial datacenter, how could it possibly be cost effective?

A data center costs $20 to $40 billion! And launch costs keep dropping.

Plus, environmental costs of data centers keep rising.

Re: Datacenters in space aren't going to work

#189
post #166

There are 8,000+ Starlink satellites in orbit right now. Each one has about 30 square-meters of solar panels. That's 240,000 square meters. ISS has 25,000 square meters, so SpaceX has already launched almost 10-times the solar panels of ISS. The next generation Starlink (V3) will have 250 square meters of solar panels per satellite, and they are planning on launching about 10,000 of them, so now you're at 2.5 million…

>Almost every single objection to data centers in space has already been overcome at a smaller scale with Starlink Did you not read the article? It had many objections that make it clear datacenters in space are unworkable...

Starlink is already a small data center! It has power, radiators, and compute!

It needs to be scaled up, but there is no obstacle to that (at least none that the article mentions).

The only valid objection is cost, but space prices keep dropping and earth prices keep rising.

Re: Datacenters in space aren't going to work

#190
post #120

Datacenters in space is about circumventing nation states masked as ambitions to generate more power. Follow the rationale: 1. Nation states ultimately control three key infrastructure pieces required to run data centers (a) land (protected by sovereign armed forces) (b) internet / internet infra (c) electricity. If crypto ever became a legitimate threat, nation states could simply seize any one of or all these three…

I'm sorry, but this is stupid. It's the same dumb thinking behind Sealand: "we're outside state borders! nobody can touch us!", which was only true as long as nobody cared what they were doing. Once Sealand actually started angering people, the Royal Navy showed up and that was that. "Datacenters in space" wouldn't fare any better: multiple nations have successfully tested anti-satellite weapons.

> Once Sealand actually started angering people, the Royal Navy showed up and that was that.

What did the royal navy do? There is no mention of the UK using force against sealand in either the Wikipedia page or this BBC article about sealand. (Though obviously the royal navy could retake sealand if they wanted)

https://en.wikipedia.org/wiki/Principality_of_Sealand

https://www.bbc.com/news/uk-england-suffolk-41135081

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