Open Source Virtualization
In the simplest of terms, virtualization can be described as the process of creating a virtual version of any technological resource—like an operating system, storage or memory—in place of actually using the resource. The entire concept of virtualization revolves around the ability to convert a single computer into multiple ones. While virtualizing an operating system with an underlying hardware device is one way to go, yet another one is the interaction between virtual and physical hosts. The operating system installed acts as the virtual machine, and the underlying operating system acts as the host.
When it comes to managing these virtual systems, there is no lack of open source tools available in the market today; this is regardless of whether an entire data centre needs to be virtualized in a cloud environment, or just test out a new operating system on your personal computer. For enterprise open source users, using Linux operating system, the use of KVM virtualization abilities that are built into the kernel seems ideal; additionally an alternative hypervisor would be Xen, with the aid of another tool to act as an abstraction layer. Some VM tools prefer the all-encompassing solution, VirtualBox. Whether it’s as simple as a command-line tool like Virsh, or an advanced tool like oVirt, these open source virtualization tools are very beneficial in the professional/enterprise arena.
Some virtualization machines use CPU technology virtualization extensions, in an effort to improve upon the performance of these Virtual Machines (VMs), which is referred to as a hardware-assisted virtualized environment. The main reason why virtualization is adopted is to reduce costs, as there is a decrease in need for hardware to be deployed. Additionally, the power of centralized management lies within the hands of the single machine that manages several other resources.
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