> -----Original Message----- > From: H [mailto:h@xxxxxxxxxxxx] > Sent: Thursday, December 15, 2005 10:09 AM > To: squid-users@xxxxxxxxxxxxxxx > Subject: Re: prefer parent peer > > > On Thursday 15 December 2005 15:32, Mark Elsen wrote: > > > Is there a way to configure Squid 2 to always first try > fetching through > > > the (only) parent, and if that fails, then go direct? > > > > > > Here's what I have now, and this fails miserably if > x.x.x.x is down: > > > > > > cache_peer x.x.x.x parent 3128 3130 no-query default > > > never_direct allow all > > > > Use : > > > > always_direct deny all > > > > > and then the access will fail also when the parent eventually > is not up or can > not serv at this moment, it dos not matter if you use > always_direct deny or > never_direct allow, both fail when parent fail > Not entirely true. From the default Squid conf: # You need to be aware that "always_direct deny foo" is NOT the same thing as "never_direct allow foo". "always_direct deny all" will not all prevent traffic from going direct. It will just prevent traffic from ALWAYS going direct. > appearently squid queries ever the parent first so no need to > use any other > parameter > This is true for most requests. There are classes of requests that Squid prefers to send direct. Look into the nonhierarchical_direct to send those requests to a parent by preference (not necessity). > may be you like using proxy-only in order not caching the object twice > > H. > This is the setup that I used to prefer a parent: always_direct allow all # default behavior nonhierarchical_direct off prefer_direct off # default behavior It's not perfect, in that some traffic (less than 1%) does manage to go direct, but it allows the client cache to continue surfing even if the parent stops responding. Using "always_direct deny all" might be more of a requirement if the parent cache doesn't reply to ICP queries. I don't know. Chris
