[chippiewill]

I think that's close to the truth. IIRC it's something like a massive cluster of machines that are effectively powered off 99% of the time with a careful sharding scheme where they're turned on and off in batches over a long period of time for periodic backup or restore of blobs.

[booi]

it's amazing that Glacier is such a huge system with so many people working on it and it's still a public mystery how it works. I've not seen a single confirmation of how it works..

[ignoramous]

Glacier could be doing similar to what Azure does: https://www.microsoft.com/en-us/research/project/project-sil...

Also see this thread: https://news.ycombinator.com/item?id=13011396

[pyuser583]

I doubt it’s using WORM drives.