Mark's blog

I've been investigating the new improved mod_proxy in Apache 2.2.x for use in our new production environment, and in particular the built-in load balancing support. It was always possible to build a load-balanced proxy server with Apache before, using some mod_rewrite voodoo, but having a whole set of directives that do all the hard work for you is a great feature.

There is however, a catch. It won't work out of the box with PHP sessions, or many other applications. I've since worked out a way around this which enables you to continue using all the great features mod_proxy_balancer offers and still bind requests to an originating server. All you need is a little mod_rewrite magic : Read on for more details...