Cloud Computing

What is Cloud Computing?...

A model for delivering information technology services in which resources are retrieved from the internet through web-based tools and applications, rather than a direct connection to a server. Data and software packages are stored in servers. However, cloud computing structure allows access to information as long as an electronic device has access to the web. This type of system allows employees to work remotely.

Cloud Computing Services

Software as a Service (SaaS)-End Users

Infrastructure as a Service (IaaS)-Application Developers

Platform as a Service (PaaS)- Network Architects

The NEW “Cloud Pyramid”

Application provided by Cloud Computing

Why would anyone want to rely on another computer system to run programs and store data?

The applications of cloud computing are practically limitless. With the right middleware, a cloud computing system could execute all the programs a normal computer could run. Potentially, everything from generic word processing software to customized computer programs designed for a specific company could work on a cloud computing system.Here are just a few reasons:

1. Clients would be able to access their applications and data from anywhere at any time. They could access the cloud computing system using any computer linked to the Internet. Data wouldn't be confined to a hard drive on one user's computer or even a corporation's internal network.

2. Servers and digital storage devices take up space. Some companies rent physical space to store servers and databases because they don't have it available on site. Cloud computing gives these companies the option of storing data on someone else's hardware, removing the need for physical space on the front end. Corporations might save money on IT support. Streamlined hardware would, in theory, have fewer problems than a network of heterogeneous machines and operating systems.

Software as a Service-End Users

Also known as On-demand Service.

Is 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.

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

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

Platform as a Service (PaaS)

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

Application developers can develop and run their software solutions on a cloud platform without the cost.

With some PaaS offers, the underlying computer and storage resources scale automatically to match application demand so that the cloud user does not have to allocate resources manually.

The latter has also been proposed by an architecture aiming to facilitate real-time in cloud environments.

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

Infrastructure as a Service (IaaS)

Also known as hardware as a service.

Is a computing power that you 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

Cloud Architecture

Modes of Clouds Public Cloud• 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

Private Cloud• The computing infrastructure is dedicated to a particular organization and not shared

with other organizations.• more expensive and more secure when compare to public cloud.• E.g. : HP data center, IBM, Sun, Oracle, 3tera

Hybrid Cloud • Organizations may host critical applications on private clouds.• where as relatively less security concerns on public cloud.• usage of both public and private together is called hybrid cloud.

Cloud Operating Systems

ZeroPC Jolicloud Glide OS SilveOS myGoya iSpaces Cloud Computer The Places A xOS Cloudo, Ghost, Zimdesk, Start force etc.,

Distributed vs. Grid vs. Cloud

Rent based on usage only

Rent Servers & Hosting costs whether used or no t

Buy Servers & Co lo costs whether used or no t

Pricing m odel

High - v irtua lizedLowLow“Green”

No contrac ts , usage based, no upfront costs

Costly , sometimes month/year contrac ts , no CapEx

High CapExCost

Ins tant, F lexible , Pay-per-usage

Slower, somewhat flexible , Costly

S lowest, R igid & CostlyScalability

MinutesDays to W eeksW eeks to MonthsTim e

CloudGridDistributed

Is Cloud Computing reduces E-Waste?.

Green IT Cloud Computing

Cloud Computing is Eco-Friendly.

We can reduce E-waste by using Cloud Computing i.e. by Infrastructure as a Service (IaaS).

Cloud Computing Helps to Accelerate Green IT

Can reduce Global Warming too..

Disadvantages of Cloud Computing

Security and privacy in the Cloud

Dependency and vendor lock-in

Technical Difficulties and Downtime

Limited control and flexibility

Increased Vulnerability

Commercial Clouds

Conclusion

Cloud computing remains strong and has great potential for the future. Its user base grows constantly and more big players are attracted to it, offering better and more fine tuned services and solutions. We can only hope that the advantages will further grow and the disadvantages will be mitigated, since cloud computing seems to have made IT a little bit easier. Happy cloud computing!

Thanking You

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