On 16/12/2011 4:36 p.m., Jeff Pang wrote:
Hello, if the site-arch is: original-server -> squid1 -> squid2 -> client
NOTE: this is a *reply* pathway. IMS is a *request*.
When client send an IMS request to squid2, will squid2 pass it to squid1 then to original-server? Thanks.
The IMS effectively stops at squid2. Whether squid2 does a new IMS for itself or a full fetch from squid1 depends on whether squid2 already has a copy of that object, whether that copy is fresh or stale or newer than the IMS date.
All those considerations are calculated, then a request is either satisfied by squid2 or a request created from a combination of the squid2 and client requirements is passed to squid1. squid1 then does its own handling on the request sent by squid2.
Amos
