Is it possible to clone a ubuntu server and if any changes made to original system must be replicated to the one cloned?. This I need to have backup support if original one gets down. In my point the ubuntu is a cloud server.
I tried "ddrescue /dev/sda /dev/sdb" on my vbox and it worked fine. The confusion is that from which disk it boots and will I have multiple boot entries at the startup?. Is it possible to use ddrescue to clone the remote hard disk?.
I want to replicate the changes made on orginal hard disk to the duplicate and so I thought of scheduling a cron job using "rsync" but after system restart the devices /dev/sda and /dev/sdb might be interchanged and it may cause problem.
For cloning, taking the server off for few minutes/hrs is mandatory?. Can't I accomplish this without taking the server off?. It should not cause any problem to the orginal disk
plz guide me step by step.