-----Original Message----- From: Graham Leggett [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 02, 2005 10:39 PM To: dev@httpd.apache.org Subject: Re: re-do of proxy request body handling - ready for review
Justin Erenkrantz wrote: > I don't understand the purpose of serving incomplete files from a cache. > Can you please elaborate on what you think mod_cache should do? -- > justin Since the early days of mod_proxy, there has been a race condition in the caching code which has been carried over to mod_cache. After an URL has been invalidated, and before the new version of that URL has been downloaded completely from the backend server, any attempts by other clients to fetch the same URL are passed to the backend server directly. This results in the load spike on the backend server briefly while the replacement cache file is downloaded. If mod_cache was taught to serve a being-cached URL directly from the cache (shadowing the real download), there would be no need for parallel connections to the backend server while the file is being cached, and no load spike. Regards, Graham --
