linux server question (kinda hardcore)

[ATO]

Been googleling all day - and hoped someone here might know something about my "problemo"

At our office i have just bought a new server which is going to be our main webserver. The old webserver we want to be our backup server. So if the main server goes down we can just plugin the old server and then the site continue to run while we fix the new server. (Both servers actually run RAID1 - but expirence says you can never be to safe)

I have thought about 2 different solutions to the problem.

1. Having a script "clone" the new server onto the old server X times a day.
2. Setting the servers up in a cluster so it kinda also work as a loadbalanced system.

Im wondering if anyone have tried one of the solutions and could point me in the direction of some websites with more info about how to set it up.

I hope someone have some input for my little easter project