Mongrel Clustering

mongrel_cluster makes it easy to manage multiple Mongrel processes behind a reverse-proxy server and load balancer such as Pound, Balance, Lighttpd, or Apache.
See also:

• Apache: Scaling Rails with Apache 2.2, mod_proxy_balancer and Mongrel .
• Lighttpd: Using Lighttpd With Mongrel
• Litespeed: setting up litespeed with mongrel