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S3 durability is pretty much the only thing I consider worth using EC2 for.

S3 egress, on the other hand, is so expensive you can often justify putting a writethrough cache for your entire working set at Hetzner...

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IIRC Cloudflare R2 is designed as a cache for S3 and has free egress

edit: apparently not writethrough: https://developers.cloudflare.com/r2/data-migration/sippy/

No, R2 is not an "S3 cache". It's a replacement for S3 with no egress fees.

Yeah, don't use Sippy. It just stopped working after 2 weeks on multiple buckets and support came back with "have you tried turning it off and on again". It's not production ready.

Also R2 is extremely basic compared to S3. For example only trivial permissions are supported and auth tokens are bound to an actual account.

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