The actual need for virtualization basically requires the prior understanding of three things: Why Virtualize? What is Virtualization? And When to Virtualize?
The virtualization technology evolution dates back to the times of mainframe computers, where the operators had to utilize huge power resources to run processes. Operating Virtualization addressed this issue by allowing the hardware resource to run multiple operating system images using a single software tool, thus managing the power utilization in running processes.
Server virtualization is the key aspect of virtualization technology, where the main server is virtualized to create a guest system that exactly works as a main system. A software layer called hypervisor makes this happen by emulating underlying hardware. Here the guest operating system uses the software emulation of the underlying hardware, i.e., virtualized hardware and not the true hardware.
The performance of the virtual system is not exactly the same as that of the true system. Even then the virtualization holds significance as most applications and guest systems may not demand full utilization of the underlying hardware.
Thus, the dependence on hardware is alleviated, allowing greater flexibility and isolation of the processes from the main system, whenever needed. Here is where the companies working on multiple applications on multiple platforms can have an advantage of minimization of extra resource utilization.
Virtualization, which was initially confined to server systems, has evolved over the years to suit for networks, desktops, data, and applications, among others.
Wings of Virtualization:
Virtualization has spread its wings across six key areas of significance in the IT industry:
Overall, fast-growing IT and end-user requirements driven by the rise in demand for automation gives a needed boost to the global IT virtualization market.