> -----Original Message----- > From: Geoff Varney [mailto:geoff.varney@xxxxxxxxxx] > Sent: Monday, July 11, 2005 10:46 AM > To: squid-users@xxxxxxxxxxxxxxx > Subject: Multiple site Squid cache servers with one > DansGuardian > > > Hi, > I have been playing around with this and haven't gotten it figure out yet, > am thinking someone here will know this right away. > > I have a main Squid proxy server that also runs DansGuardian. Currently I > point browsers to DG, which then goes through Squid. However I have 3 other > sites (school district) and would like to place a Squid box at each of them > to cache for the local site, thus eliminating some of the Web traffic across > the T1s. > > In my testing of one of these site Squid boxes it seems that I am getting > misses when revisiting a site if DG is set as a cache_peer. I think I need > to configure this differently, but not sure what needs to be changed. What kind of miss? A TCP_MISS is different from a TCP_CLIENT_REFRESH_MISS. Read the FAQ (especially http://www.squid-cache.org/Doc/FAQ/FAQ-6.html#ss6.7) for details. > > I have tried: > > cache_peer <ip of DG server> parent 8080 7 no-query This is the correct setup if you want caching at both the parent (DG) and child (client) level. > > cache_peer <ip of DG server> parent 8080 7 no-query proxy-only This will prevent caching at the child level. Parent proxy should still cache. > > cache_peer <ip of DG server> parent 8080 7 allow-miss no-query proxy-only Same story here. The allow-miss directive will not make a difference if children are forced to use parent proxy. > > and perhaps a couple of others. > > Of course I want the local Squid to cache anything that DG allows access to, > but the Squid log shows MISS when I go to a site I've already visited. I am > seeing some MEM HITS on the local proxy, but watching where traffic out to > Internet is originating shows that the main proxy (Squid/DG box) is going > out for pages, so it's not caching for the other site either. You might use the cacheability engine (http://www.web-caching.com/cacheability.html) to see if the page you are using as a test is actually cacheable. Just to be sure... > > All works normally if I set my browser to use the main proxy (DG) it seems. > > What should my settings be in order to have the following happen: > > Site Squids to cache for local site Set up a Squid server at the local site. > > Main Squid to cache for site Squids (children?) as well as main site > Set up "main" squid server, allow http_access from child proxies. Set child proxies up to use main server as parent. > DG to filter for everyone, but not be queried when the local site server has > the page in its cache. > Use "never_direct allow all" on child proxies to force them to use parent. If the child proxy has the page cached, it will not query parent proxies. > Hopefully I'm clear with what I'm trying to do. I'd like to avoid running > DG on all site servers, unless that is the only or best way to go. > > I'm using: > Redhat FC3 > Squid 2.5STABLE9 with forwarded-for patch > DansGuardian 2.8.0.4 > > Thanks, > Geoff Chris
