As in the early topic, you have learned about the virtualization, its types, work, and features. The virtualization types itself make a broad topic. So let's first discuss the Hardware Virtualization in detail.
Hardware Virtualization
It is the abstraction of computing resources from the software
that uses cloud resources. It involves embedding virtual machine
software into the server's hardware components. That software is
called the hypervisor. The hypervisor manages the shared physical
hardware resources between the guest OS & the host OS. The
abstracted hardware is represented as actual hardware.
Virtualization means abstraction & hardware virtualization is
achieved by abstracting the physical hardware part using Virtual
Machine Monitor (VMM) or hypervisor. Hypervisors rely on command
set extensions in the processors to accelerate common
virtualization activities for boosting the performance. The
term hardware virtualization is used when VMM or virtual machine
software or any hypervisor gets directly installed on the hardware
system. The primary task of the hypervisor is to process
monitoring, memory & hardware controlling. After hardware
virtualization is done, different operating systems can be
installed, and various applications can run on it. Hardware
virtualization, when done for server platforms, is also called
server virtualization.
Advantages of Hardware Virtualization
The benefits of hardware virtualization decrease the overall
cost of cloud users and increase flexibility.
The advantages
are:
- Lower Cost: Because of server consolidation, the cost decreases; now, multiple OS can exist together in a single hardware. This minimizes the quantity of rack space, reduces the number of servers, and eventually drops the power consumption.
- Efficient resource utilization: Physical resources can be shared among virtual machines. Another virtual machine can use the unused resources allocated by one virtual machine in case of any need.
- Increase IT flexibility: The quick development of hardware resources became possible using virtualization, and the resources can be managed consistently also.
- Advanced Hardware Virtualization features: With the advancement of modern hypervisors, highly complex operations maximize the abstraction of hardware & ensure maximum uptime. This technique helps to migrate an ongoing virtual machine from one host to another host dynamically.
Types of Hardware Virtualization
Hardware virtualization is of three kinds.
These are:
- Full Virtualization: Here, the hardware architecture is completely simulated. Guest software doesn't need any modification to run any applications.
- Emulation Virtualization: Here, the virtual machine simulates the hardware & is independent. Furthermore, the guest OS doesn't require any modification.
- Para-Virtualization: Here, the hardware is not simulated; instead, the guest software runs its isolated system.
