Chris Marusich <cmmarus...@gmail.com> skribis: > l...@gnu.org (Ludovic Courtès) writes: > >> Yeah, mirror.guixsd.org also caches for one week now. I wasn’t sure how >> much disk space that would represent, but so far we’re around 10G, so >> increasing to 1 week seemed reasonable. > > Are there any URL paths a caching proxy should NOT cache for a long > time? My understanding is that it's OK to cache all URL paths for 1 > week. Are there any URL paths for which I should return something > different from Hydra (e.g., /nix-cache-info)?
Everything can be cached, where “everything” really means: /nix-cache-info /.*\.narinfo$ /nar/.* The rest should not be proxied at all, because it’s dynamic in nature and some of it is quite expensive to generate (things that involve complex SQL queries.) >> OK. >> >> Do you know exactly how much is cached? Also, when does caching happen? > > Every OK result is cached for 7 days. My understanding is that negative > results (e.g., 404) are not cached. The storage limit is effectively > unlimited from my perspective, since CloudFront is a service. Good. :-) >> When using nginx as a proxy as on mirror.guixsd.org, it fetches things >> lazily, so on a cache miss it goes connect to hydra.gnu.org. > > CloudFront operates the same way. Yeah, I’ve seen from the headers that it runs nginx. Thanks, Ludo’.
