Syncing two servers

[Logomo]

Hello, here's my setup.
One production server running Plesk 11 on Ubuntu server.
One mirror server running Plesk 11 on Ubuntu server too.

I want to sync all my clients and domains from production to mirror server each night.

I tried to copy backup file from prod to mirror then restore the backup file, and I have many errors.

Could someone tells me how I should proceed?

Thanks for the help.