Virtualization Technology & its importance to Cloud computing & DevOps

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Virtualization is a key concept that aspiring Cloud engineers and DevOps engineer need to have knowledge on. It is the backbone of modern IT infrastructure and the enabler of industries such as cloud computing. 


So, what is virtualization? What are hypervisors? Why is this technology important and why do companies adopt this technology? 

What is Virtualization?

Virtualization: 

-  is a technology that allows you to create multiple simulated environments or dedicated resources from a single, physical hardware system

- it acts as an abstraction layer between the physical hardware and the software that runs on it

So then, what is a hypervisor? how is different from virtualization?

Virtualization is the process (the "what"), and the Hypervisor is the technology (the "how").

Hypervisor:

- specific software that performs the act of virtualization

- is the engine that sits on the hardware and manages the virtual machines (VMs)

The hypervisor is responsible for:

- Dividing the physical resources (CPU, RAM, Storage).

- Keeping the virtual machines isolated from one another.

- & Communicating between the physical hardware and the "guest" operating systems.

A very simple example of a hypervisor is the Oracle VM VirtualBox. Virtual Box allows us to partition components of our physical computer hardware and allow us to install and run a completely different Operating System.

Why is virtualization important?

Virtualization is a key piece of technology that allows us to 

1. Optimize resource allocation

2. Improve Isolation & Security

3. Allow for flexibility & Scalability

4. Ensure cost efficiency

Key Virtualization Types

Server: One physical server, many virtual ones.

Network: Divides bandwidth into independent channels.

Storage: Consolidates multiple devices into one pool.

Desktop: Hosts user environments on a central server.

In conclusion:

Virtualization is defined by abstraction, decoupling software from physical hardware to drive the efficiency of the modern cloud. 

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