Re: [squid-users] Re: Akamai-like CDN using squid and a DNS trick

On ons, 2007-09-05 at 12:37 -0700, Neil Harkins wrote:
> On 9/5/07, Oliver Schoett <os@sdm.de> wrote:
> > Did you notice any ill effects of Bug 7
> > (http://www.squid-cache.org/bugs/show_bug.cgi?id=7)? This bug makes
> > Squid deliver resources with expiration times in the past, thus causing
> > the clients to revalidate the resources every time they are used.
>
> Ugh, first I've heard of this bug. So, in an httpd-"accel" setup,
> we're wasting more bandwidth than if we didn't use squid at all!?
>
> Can anything be done in the config to mitigate?

There is an act-as-origin http_port option in Squid-2.HEAD which solves
most of this...

> Is the STALE state always refreshed by a IMS request?
> Is there a way to force a purge/re-get instead of an IMS?
> i.e. It'd be nice if lm-factor > percent generated an IMS,
> but age >max resulted in a purge and re-GET...

The problem that Squid do not refresh the stored headers when making an
IMS, only updating it's internal freshness of the object.

Regards
Henrik