The fediverse is de-centralised, but it still needs to be hosted behind something, in this post I investigate where the most of the instances are, and working around caching proxies to get a better idea of how resilient to hosting disasters the ecosystem is.
https://blog.benjojo.co.uk/post/who-hosts-the-fediverse-instances
@benjojo Another concentration is that I suspect that a lot of instances depend on Amazon S3. And it is quite difficult to see it from the outside.
@bortzmeyer @benjojo I would wager that fewer rely on S3 than you'd expect, and even fewer when you account for user counts. A lot of these providers have their own S3 workalikes that are easy enough to set up, or folks can use R2, B2, or Wasabi. My guess is no single cloud storage provider has 51% like Hetz er does of compute.