Cloud System and Virtualization Technologies

CSTV-UNIT-II

A cloud system refers to delivering computing servicesÔlike servers, storage, databases, networking, and softwareÔover the internet (Üthe cloudÝ) instead of using local machines.

Key Features

• On-demand access: Resources are available whenever needed.
• Scalability: Easily increase or decrease resources.
• Pay-as-you-go: Users pay only for what they use.
• Remote access: Access services from anywhere.

Types of Cloud Services

• IaaS (Infrastructure as a Service)
  Provides virtualized hardware resources (e.g., Amazon Web Services EC2).
• PaaS (Platform as a Service)
  Offers a platform to develop and deploy applications (e.g., Google Cloud Platform).
• SaaS (Software as a Service)
  Delivers software applications over the internet (e.g., Microsoft 365).

Deployment Models

• Public Cloud Ó Shared infrastructure (e.g., Microsoft Azure)
• Private Cloud Ó Dedicated to a single organization
• Hybrid Cloud Ó Combination of public and private clouds

2. Virtualization Technology

Virtualization is the process of creating virtual versions of physical resources like servers, storage devices, or networks. It is the core technology that enables cloud computing.

How It Works

A hypervisor (software layer) sits between hardware and operating systems, allowing multiple virtual machines ***s) to run on a single physical machine.

Types of Virtualization

• Server Virtualization
  Splits one physical server into multiple virtual servers.
• Storage Virtualization
  Combines multiple storage devices into a single virtual storage unit.
• Network Virtualization
  Creates virtual networks independent of physical hardware.
• Desktop Virtualization
  Allows users to access desktops remotely.