The Metamorphosis of Modern IT
Cloud computing and virtualization have completely revolutionized the way companies manage hardware and software services.
What is Cloud Computing
Cloud Computing is the model that allows access on demand, via the Internet, to shared and configurable computer resources.
It is based on three main types of service models.
IaaS (Infrastructure as a Service): Provides raw hardware resources, such as virtual machines, storage, and configurable networks (e.g., AWS, Azure).
PaaS (Platform as a Service): Offers a ready-to-use development and runtime platform, eliminating the need to manage underlying operating systems.
SaaS (Software as a Service): Distributes ready-to-use applications directly through web browsers (e.g., Gmail, Microsoft 365).
Cloud distribution models include Public, Private for single business use, or highly flexible Hybrid solutions.
Virtualization: The Enabling Technology
Virtualization is the software technology that allows creating logical and independent copies of physical resources on a single computer.
This engineering miracle is orchestrated by special software called Hypervisor or Virtual Machine Monitor (VMM).
Type 1 Hypervisor (Bare-metal) runs directly on physical hardware to maximize enterprise server performance.
Type 2 Hypervisor (Hosted) runs as normal software on a host operating system (e.g., VirtualBox, VMware Workstation).
It optimizes hardware use, drastically reducing energy consumption and data center maintenance costs.
Containerization (e.g., Docker) takes this concept further, virtualizing only the operating system instead of the entire hardware.
Conclusions
The synergistic adoption of virtualization and cloud enables modern startups to scale globally in just a few minutes.