I use two different scripts: 1. dwatch http://nubyonrails.com/articles/2006/03/29/surviving-rails-1-1-with-server-monitoring http://nubyonrails.com/articles/20

I use two different scripts: 1. dwatch http://nubyonrails.com/articles/2006/03/29/surviving-rails-1-1-with-server-monitoring http://nubyonrails.com/articles/2006/03/29/surviving-rails-1... 2. a PHP script that accesses a URL on the other server; if the server does not respond as expected, it sends me a SMS and emails the server admin