On tor, 2008-10-02 at 10:57 +0200, Christian Tzolov wrote: > I am scared by the "I believe" part :). > > 1. Can we relay on Squid to always update its cached content if the > response is newer (e.g. response has new Expires date and no other > validators)? Yes. > 2. Squid does not change/optimize its behavior under high load in way > that could affect assumption (1)? Under very high load you may in worst case end up with no on-disk copy of the cached object if an overload condition does not allow writing objects out to disk.. > 3. If (1) holds is this a (HTTP) standard behavior or Squid > implementation? Yes. Or to be exact the standard requires the old copy to be invalidated if different from the new. There is no requirement to cache the new representation. Note however that there is a significant difference between no-cache and max-age=0: * no-cache forces a new retreival, The response is not allowed to be satisfied from cache. * max-age=0 forces a cache validation and allows the old version to be returned if the server says it's still fresh. Regards Henrik
Attachment:
signature.asc
Description: This is a digitally signed message part
