varnish v2.1: Where is "set obj.ttl" now allowed?

Laurence Rowe l at
Mon Mar 29 17:57:47 CEST 2010

On 29 March 2010 11:42, Jens Schleusener
<Jens.Schleusener at> wrote:

> And another currently not important question: Principally much of the
> backend pages are delivered in two versions (for user-agent IE and for
> user-agent Firefox incl. others). So an idea may be to have two specific
> varnish caches like
>       /- varnish IE -\
>  Apache                Backend CMS
>       \- varnish FF -/
> The Apache as "user-agent"-scheduler is just choosen since it could/should
> also do other tasks. Would that be meaningful or can varnish control that
> already itself?

Your backend probably compresses responses and adds a "Vary:
Accept-Encoding" header. As IE and FF have slightly different versions
of this header, you need should normalise it in vcl_recv. See


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