Server virtualization allows you to run applications on fewer physical servers. The Virtualization software, called a Hypervisor, allows each application and operating system to live in a separate container running side by side on a single physical server; each guest virtual server is fully isolated and fully encapsulated. Competing resources, like CPU’s, storage and networking are pooled together so each application gets what it needs for peak performance. This maximizes the server’s hardware resources so you don’t need nearly as many physical host servers.
With server virtualization, all the servers you had in the physical environment now have a hardware layer and a virtualization layer. Running on top of these layers are your applications, each with their own separate operating system (like Windows, Linux, etc.). These applications run in isolation, just as they would in a physical environment.
The kinds of consolidation ratios customers are seeing today range from 10:1 to 20:1. This means that customers running 80 servers in a physical environment can now consolidate that down to as low as 4-6 servers.
As a result, your hardware and overhead requirements drop while application performance can improve, giving you greater value at a lower cost. On average customers are getting a return on investment in less than three to six months.