How big is the binary cache? Would it be reasonable to make a mirror?

[wamserma]

Here’s a summary:

NixOS Foundation's Financial Summary: A Transparent Look into 2022

Some info on our AWS costs (primarily cache.nixos.org and releases.nixos.org): The S3 bucket for cache.nixos.org stores 667M objects, with 107 TiB in standard storage and 318 TiB in infrequent access storage, so 425 TiB in total. The S3 bucket for nix-releases (i.e. https://releases.nixos.org) is 25.1 TiB (mostly ISO images). The S3 storage costs for our sponsor are about $5500 per month, after a $2300 enterprise discount. The S3 transfer costs are about $900 per month, which is most…