> You could also redirect the client to the proxy/cache after computing the > filename, but that exposes the name in a way that might be reusable.
perlbal is great for this... I think nginx might be able to do it too? Internal "reproxy". Server returns headers for where the load balancer is to re-run a request through to. Mostly it's used for looking up mogilefs addresses, but could also be used to redirect files through caches and such.
