We are using in our company on one physical server ESXi 5.1 host, and five virtual machines inside that host.
Also we bought another physical server for some testing purposes. At the moment it's not yet configured.
Goal question: What is the best solution to replicate these VM on another server (which I mention), in the case we need to do some backup regularly, but in the other case that our production application still be accessed from outside.
At the moment, when I power off VM, and do backup, application are not accessible for our customers.