CLOUDCOMPUTING

Global Light

Cloud computing is an environment created in a user’s machine from an on-line application stored on the cloud and run through a web browser.

Example: Gmail, Hotmail, Yahoo!

Instead of running an e-mail program on our computer, we login to a Web email account remotely. The software and storage for our account doesn't exist on our computer - it's on the service's computer cloud.

What is Cloud Computing?..

History

CC concept 1st evolved by IBM in 1950 called RJE (Remote

Job Entry Process)

In 2006 Amazon provided first public cloud

AWS (Amazon Web Service)

Cloud Components

Internet

ClientPC

Distributed Servers

Data Centres

Clients

Clients

Mobile

Thick

Thin

Clients are the device through which the end user interact with cloud.

Distributed Servers

Often servers are in geographically different places, but server acts as if they are working next to each other.

Server Data

Access

Application Server

Message Server

File System Server

Mail Server

Proxy Servers

Database Server

Web Server

Backup Server

Telnet Server

Datacentre

It is collection of servers where application is placed and is accessed via internet.

Service Models

Cloud Computing Services

SaaS(Software as a service)

Required software, Operating system & network is provided

PaaS(Platform as service)

Operating system and network is provided

IaaS(Infrastructure as a service)

Just Network is provided

SaaS

Also known as On-demand Service.

It’s an application that can be accessed from anywhere on the world as long as you can have an computer with an Internet Connection.

We can access this cloud hosted application without any additional hardware or software.

Also it can provide security features such as SSL encryption, a cryptographic protocol.

E.g. : Facebook, G-mail, Yahoo mail, Hotmail etc.

PaaS

Give us nice API (Application Programming Interface) and take care of the implementation.

In the PaaS model, cloud providers deliver a computing platform and solution stack typically including operating system, programming language execution environment, database, and web server.

It's a platform for developers to write and create their own SaaS applications.

Which means rapid development at low cost.

E.g. : Windows Azure, Salesforce.com, Joyent etc.

IaaS

Also known as hardware as a service.

It's a computing power that we can rent for a limited period of time.

Allows existing applications to be run on a cloud suppliers hardware.

Cloud providers offer computers - as physical or more often as virtual machines - raw (block) storage, firewalls, load balancers, and networks.

E.g. : OpSource, GO GRID, at&t etc.

Cloud Pyramid

SaaSEnd Users

PaaSApplication Developers

IaaSNetwork Architect

Cloud Architecture

Deployment Models

Modes

Public Cloud

Private Cloud

Hybrid Cloud

Community Cloud

Deployment Models

Computing infrastructure is hosted by cloud vendor at the vendors premises and can be shared by various organizations.E.g. : Amazon, Google, Microsoft, Sales force etc.

Public Cloud The computing

infrastructure is dedicated to a particular organization and not shared with other organizations.It's more expensive and more secure when compare to public cloud.E.g. : HP data centre, IBM, Sun, Oracle, 3tera etc.

Private Cloud

Deployment Models

Usage of both public and private together is called hybrid cloud.Organizations may host critical applications on private clouds.Where as relatively less security concerns on public cloud.

Hybrid / Combined

Cloud A community cloud is formed when several organizations with similar requirements share common infrastructure.Costs are spread over fewer users than a public cloud but more than a single tenant.

Community Cloud

Cloud Operating Systems

Cloud OS

Amoeba OS

Cloudo

CorneliOS

Eye OS

GhostGlide OS

Lucid Desktop

myGoya

Start Force

Zimdesk

Application

Social Networking sites

E-mail sites

Search Engines etc.

Applications

Why Cloud Service Is Popular?

Reduce the complexity of networks.

Do not have to buy software licenses.

Customization.

Cloud providers that have specialized in a particular area (such as e-mail) can bring advanced services that a single company might not be able to afford or develop.

Scalability, Reliability, and Efficiency.

Info at cloud are not easily lost.

Advantages of CC

CC Advantages

Lower Computer

Costs Improved Performance

Reduced Software

Costs

Instant Software Updates

Improved Document

Format Compatibility

Unlimited Storage Capacity

Increased Data

Reliability

Universal Document

Access

Latest Version

Availability

Easier Group Collaboration

Disadvantages of CC

CC Disadvantages

Requires A Constant Internet

Connection Does Not Work Well With Low-

speed Connections

Features Might Be Limited

Can Be SlowStored Data

Might Not Be Secure

Stored Data Can Be Lost

General Concerns

Conclusion

Cloud computing offers benefits for organizations and individuals. There are also privacy and security concerns. If we are considering a cloud service, we should think about how our personal information and that of our customers, can best be protected. Carefully review the terms of service or contracts and challenge the provider to meet our needs.

Thank you!

Any Queries?..Represented by:

Pran Krishna Das