- By Sapan shah (CE 09 58)

Computer Science

CLOUD COMPUTING

Outline:

• What is Cloud Computing?
• Explanation
• How it’s works?
• Types of Cloud Computing
• Layers of Cloud Computing
• Services
• Advantages & Disadvantages

What Is Cloud Computing

• …moving computing and data away from the desktop & the portable PC and simply displaying the result of computing that takes place in a centralized location and is then transmitted via internet to user’s screen.
• It offers the ability to access software or information that can be delivered on- demand , over the internet , without the need to store it locally.

Explanation:

• A simple example of Cloud Computing is Yahoo or Gmail etc. You don’t need a software or a server to use them. All a consumer would need is just an internet connection and you can start sending emails. The server and email management software is all on the cloud(internet) and is managed by the cloud service provider like Yahoo, Google etc.
• The consumer gets to use the software alone and enjoy the benefits. The analogy is “If you only need milk, would you buy a cow?”. All the users need is to get the benefits of using the software of computer like sending emails etc.. Just to get this benefit (MILK) why should a consumer buy software (COW)?

How It’s Works:

• In a cloud computing system, there’s a significant workload shift. Local computers no longer have to do all the heavy lifting when it comes to running application. The network of computers that make up the cloud handles them instead. Hardware and software demands on the user’s side decrease. The only thing the user’s computer needs to be able to run is the cloud computing system's interface software, which can be as simple as a web browser, and the cloud’s network takes care of the rest.

How It’s Works:

• Can logically be divided into 2 sections
• Front end
• Back end

Front end

Network

Back end

• Front end includes –
• the client’s computers
• application required to access the cloud computing
• e.g.: Internet Explorer, FireFox etc.
• Back end includes –
• computer networks, servers and any data storage system
• Practically, any computer program you can imagine from data processing to video games
• Control node…also called as Central server.

Types Of Cloud Computing:

• Private Cloud
• Public Cloud
• Community Cloud
• Hybrid Cloud

Private Cloud:

• Provide hosted services to a limited number of people.
• Reliable
• Secure
• Efficient
• Controlled
• Flexible

Public Cloud:

• Service provider makes resources dynamically available
• Benefits:
• easy and in expensive setup
• scalability
• no wasted resources
• Ex: Amazon Elastic

Computer cloud,

IBM’s Blue Cloud,

Sun Cloud, Google AppEngine.

Community Cloud:

• Organizations having similar requirement
• Privacy, security, and policy compliance
• Ex.: Google’s “Gov Cloud”

Hybrid Cloud:

• Multiple internal and external providers
• Composition of more clouds
• Application:
• Archiving of

backup functions.

• deploying a web

application in the cloud.

Layers Of Cloud Computing:

• The five layers:

Client:

• Hardware & Software
• Essentially useless

without cloud

• E.g.: Computers

& phones.

Application (SaaS):

• Run over internet
• No need to

install\maintain

• Complete,

customizable application

• E.g.: Google Apps,

SalesForce CRM.

Platform (PaaS):

• Deployment without

complexity

• Eliminate most

management tasks

• Pre-built components
• E.g.: Google App

Engine, Microsoft Azure.

Infrastructure (IaaS):

• Network of servers
• Virtualized
• Billed on utility ba
• E.g.: Nimbus, AWS.

Server:

• Hardware \ Software
• Network of virtualized

computer

• E.g.: better OS, multi-

core processors

Services:

Advantages And Effects:

• Data isn’t “chained” to one place; rather, it can be accessed anywhere, from any medium.
• Processor speed becomes less important then internet connection speed.
• Netbooks become practical.
• Low maintenance.
• Privacy.

Disadvantage :

• No control over the business assets (data). The main assets in every company are its data files with valuable customer information.
• Physical location of hardware and software is unknown. Site inspections and audits are hard.
• Availability. Constant connectivity is required.
• Risk of data loss due to improper backups or system failure.

Conclusion:

​

​

​

​

​

“Go Cloud”

​

​

​

​

​

​

​

Thanks…