Only tangentially related to the article, but I’ve never understood how R2 offers 11 9s of durability. I trust that S3 offers 11 9s because Amazon has shown, publicly, that they care a ton about designing reliable, fault tolerant, correct systems (eg Shardstore and Shuttle)

Cloudflare’s documentation just says “we offer 11 9s, same as S3”, and that’s that. It’s not that I don’t believe them but… how can a smaller organization make the same guarantees?

It implies to me that either Amazon is wasting a ton of money on their reliability work (possible) or that cloudflare’s 11 9s guarantee comes with some asterisks.