Cloud Computing Fares Jemni

Ali Ben Messaoud

Plan

• Introduction

• What is Cloud Computing ?

• Cloud Computing Approaches

• Key Technology: Virtualization

• Conclusion

Introduction • Cloud Computing is a new and exciting trend which many of

us, even in the information technology field are, let’s say, a “little cloudy about”.

• What is cloud computing?

• Are there different levels or types of cloud computing?

• Who exactly are these cloud computing providers?

What is Cloud Computing?

• Cloud Computing is a general term used to describe a new class of network based computing that takes place over the Internet, • a collection/group of integrated and networked hardware,

software and Internet infrastructure

• provides hardware, software and networking services to clients

• These platforms (networked hardware) hide the complexity to provide a very simple service

What is Cloud Computing?

• Anything outside of your system’s firewall and includes a pay-per-use or subscription service that extends your agencies information technology through the internet as the primary access point.

Basic Cloud Characteristics • “no-need-to-know”

• details of infrastructure, applications interface with the infrastructure via the APIs.

• “flexibility and elasticity”

• scale up and down allocated resource

• “pay as much as used and needed”

• “always on!, anywhere and any place”

3 Approaches to Cloud Computing

• Software as a service (SaaS) :

• access to software and its functions remotely through internet browsers.

• Platform as a service (PaaS) :

• computing platform is being delivered as a service, eg. purchase and manage hardware remotely.

• Infrastructure as a service (IaaS) :

• defined as computer infrastructure, such as virtualization, being delivered as a service.

• billed on usage and how much of the resource is used in data centers for example.

XaaS

Key Technology: Virtualization • The ability to run multiple version of something, such as a

hardware platform, operating system, a storage device or network resources on a single physical system and share the underlying hardware resources.

• cloud computing is famous for scalability because of virtualization.

• Without virtualization, cloud computing as we know it would not exist or would be in a different form.

Virtualize for Efficiency, Higher Availability, and Lower Costs • Run multiple operating systems and applications on a single

computer

• Consolidate hardware to get vastly higher productivity from fewer servers

• Save 50% or more on overall IT costs

• Speed and simplify IT management, maintenance, and the deployment of new applications

Virtualization How it Works?

Virtualization+Cloud

Conclusion

• Cloud computing is the future.

• Cost

• Performance

• Data and Security

• Support

• Service Level Agreements