I'd like to do multiple webservers. Currently I have one and would like to add one or two more to lessen downtime chances. I'm finding conflicting stories online on how to do it. How do sessions work with multiple servers? Do I need to share the session files across the webservers, or does the client pick a server and always use that server? I'd like to load balance websites that have shopping carts, as well as groupware-type (email, office tools, etc) sites. Any ideas/experience/input? Thanks!