Sync 2 ioFTPD servers

[whocarez2k5]

I'm looking for a simple script that will sync 2 servers to be exactly the same.
The sync progress can be done for example during lunches and at midnight.
I looked true the scripts dir but couldn’t find exactly what I need or searched for the wrong keyword.

Sample:
Server1 is the main server and Server2 is the backup server, so if Server1 crashes for some reason Server2 needs to take control or must have at least the same files as Server1 had before it crashed.