Using Varnish to capitalize on image hotlinkers and retain referred visitorsYou have to wake an Apache (or, in general, Web server) instance every time a hotlinked request is made. This is expensive if your site is high-volume and your Web server processes take up a lot of RAM (PHP- and Python-configured Web servers do). You have no way of distinguishing an image from a page, other than by URL (file extension / site section). Thus, if you serve dynamically-generated ima
Kristian’s web log » Common Varnish issues
