Virtual servers have many benefits over traditional hardware based server farms. One benefit is the way a virtual machine takes periodic “snapshots” of your entire VM system, including applications and data.
Virtual snapshots, often performed with the help of apps like vSphere on VMware machines, take place periodically, at intervals either pre-determined by the programmer or set by your IT department.
Let's take a look at how the process works.
Virtualization Snapshot Process
At pre-determined intervals, your virtual server takes a snapshot (much like taking a screenshot of a particular screen on your computer using Ctrl + V) of your entire virtual machine disk, treating it as an individual virtual machine disk file.