On Mon, 26 Oct 2009 21:05:55 +0000, Gavin McCullagh <gavin.mccullagh@xxxxxx> wrote: > On Sat, 08 Aug 2009, Amos Jeffries wrote: > >> In a school situation you will also find the collapsed_forwarding >> features of Squid very useful. It can reduce/collapse a full classroom >> worth of duplicate requests for the same lesson website, down to a set >> of single requests to fetch the page once. > > I don't mean to be smart here but the feature page says: > > http://wiki.squid-cache.org/Features/CollapsedForwarding > > "To remedy this situation this patch adds a new tuning knob to squid.conf, > making Squid delay further requests while a cache revalidation or cache > miss is being resolved. This sacrifices general proxy latency in favor > for > accelerator performance and thus should not be enabled unless you are > running an accelerator." > > So is collapsed forwarding generally a bad idea for a forward proxy? "Generally" its has fewer benefits under forward than reverse proxies. It shines under reverse-proxy where the same vcontent is hit frequently and from many sources. With forward-proxy its hit much less but can still improve speed for popular websites (if cachable) and smooth out traffic volume bumps for automatic updates of software. In your case a classroom worth of students+teacher potentially hitting the same websites at the same time for a class project. Amos
