For now i have purchase 2 server 1 for main and 1 for worker. I planning to add one more VM server for redundant in case the main server goes wrong. My question is, can we clone main server to the redundant server ? What i think i want to do is, take main server image every 5 minute for 30Backup keep replace the backup.The moment main server down, we just restore the image to the redundant server. But i still think about what software i should use to sync/backup the server and how i want to store the clone server backup. What your experiences ? and how can i handle this thing in proper way?