Architecture Suggestions

In this section, LB = load balancer (the module + apache).
The shared memory segment, locks, and mod_athena engine are shared by ALL virtual hosts in a particular configuration. It exists per httpd instance. If you run more than one instance, be sure to have unique shm and mutex paths for each.

The following are layout building blocks, and can function by themselves, or in combination. The frist three combine easily with that last two. Any setup can be mirrored, and you can use a http reverse proxy setup as a standalone at the same time.