This document defines virtualization and cloud computing. Virtualization refers to creating virtual versions of hardware and resources that allow multiple operating systems to run on a single physical system by sharing underlying hardware. A hypervisor manages virtual machines (VMs), which are isolated runtime environments. Cloud computing delivers hosted services over the internet, providing on-demand access to resources that can be rapidly provisioned. It offers software, platform, and infrastructure services. Virtualization is an element of cloud computing that allows for efficient sharing of computing resources.

1. Virtualization and Cloud Computing
Carlos G. Robledo
IT System Admin

2. Definition
• In computing, Virtualization refers to the act of
creating a virtual (rather than actual) version of
something, including virtual computer hardware
platforms, storage devices, and computer
network resources.
• IT is the ability to run multiple operating systems
on a single physical system and share the
underlying hardware resources*
*VMWare white paper, Virtualization Overview

3. Virtualization Architecture
• A Virtual machine (VM) is an isolated runtime environment
(guest OS and applications)
•Multiple virtual systems (VMs) can run on a single physical
system

4. Hypervisor
• A hypervisor, a virtual machine
manager/monitor (VMM), or virtualization
manager, is a program that allows multiple
operating systems to share a single hardware
host, controlling the host processor and
resources.

5. Benefits of Virtualization
• Sharing of resources helps cost reduction.
• Encapsulation: Virtual machines encapsulate a
complete computing environment.

6. Benefits of Virtualization
• Isolation: Virtual machines are isolated from each
other as if they are physically separated.
• Hardware Independence: Virtual machines run
independently of underlying hardware
• Portability: Virtual machines can be migrated
between different hosts.

7. Virtualization in Cloud Computing
• Cloud computing is a general term for the delivery of
hosted services over the internet.

8. Benefit of Cloud Computing
• On-demand self-service.
• Broad network access.
• Resource pooling.
• Rapid elasticity.
• Measured service.

9. Cloud Computing Services Categories
Software as a Service (SaaS)
Platform as a Service (PaaS)
Infrastructure as a Service (IaaS)

10. Cloud Computing SaaS
• The capability provided to the consumer is to
use the provider’s applications running on a
cloud infrastructure.
• Saas alleviates the burden of software
maintenance/support.

11. Cloud Computing PaaS
• The capability provided to the consumer is to
deploy onto the cloud infrastructure
consumer-created or acquired applications
created using programming languages,
libraries, services, and tools supported by the
provider.

12. Cloud Computing IaaS
The capability provided to the consumer is to
provision processing, storage, networks, and
other fundamental computing resources where
the consumer is able to deploy and run arbitrary
software, which can include operating systems
and applications.

13. Virtualization Versus Cloud Computing
• Broadly speaking, these two technologies share a
common bond:
• They are both meant to increase efficiencies and
reduce costs.
• They are quite different though:
• Virtualization is one of the elements that forms cloud
computing.

14. “Thanks to cloud computing, wherever
you go your data goes with you”