I'm setting up a new web server and was wondering if the following is a valid stack:
Varnish in front to cache and split traffic between nginx for static content and Apache with mod_php for dynamic content.
I'd also be running APC as the opcode cache for PHP and memcached as a data cache.
Is this a valid configuration? Do I need to bother running APC if some of my PHP is already being cached by Varnish?