Improvements to cache.nixos.org (help test the new config!)

[tim1]

@thoughtpolice

I would also appreciate any feedback from users who hit the cache from Asia/Australia for example. Previously, these users would normally connect somewhere like Singapore/Hong Kong, which would then later connect all the way to us-east-1. This would require a very large TCP handshake across the globe, making latency quite bad, especially in the case of many small misses (e.g. for many narinfo files which do not exist, which would effectively be a worst-case.)

I am in China, and wondering if that is the cause of the following problem:

What to do with these errors or warnings when upgrading my nixos channel from 22.05 to 23.05?

I got the following errors or warnings(?) when upgrading my nixos channel from 22.05 to 23.05 following nix - How do I upgrade Nixos to use a new channel nixos version? - Unix & Linux Stack Exchange. Are they warnings or errors? What shall I do with each of them? $ sudo nixos-rebuild --upgrade boot ... copying path '/nix/store/6jfpwh7wmd1zqn4kpy4q98skzv26k14a-jemalloc-5.3.0' from 'https://cache.nixos.org'... warning: error: unable to download 'https://cache.nixos.org/nar/03366ngpqxm9gynfv4n…