Cloud Computing

Presentation By RAVI NAMBOORI

Outline of the Talk

• Introduction to Cloud Computing

• Demonstration of Cloud capabilities

• Infrastructure as a Service

• Platform as a Service

• Software as a Service

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Introduction to Cloud Computing

A cloud is an amalgamation of hardware, networks, storage, services, and interfaces that helps in

distributing computing as a service. It has broadly three users which are end user, business management

user, and cloud service provider. The end user is the one who uses the services provided by the cloud. The

business management user in the cloud takes the responsibility of the data and the services provided by

the cloud. The cloud service provider is the one who takes care or is responsible for the maintenance of

the IT assets of the cloud. The cloud acts as a common centre for its users to fulfil their computing needs.

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Cloud computing is a method of accessing numerous servers by an electronic device with digital network

such as WAN or any internet connection. Cloud computing is the future of information technology. It

embodies all the big trends in the design and use of computer architectures. And it ties closely to other

trends such as big data and the "Internet of things."4

Benefits

There are numerous benefits of cloud computing including data backup and storage of data, powerful

server capabilities, software as a service known as (SaaS) etc.

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Private V/S Public Clouds

The Cloud, apart from its different layers, is also visible through three alternates. There are the public

Clouds for instance, a deployment option for initiatives where the infrastructure services are provided by

a hosting partner. It is this third party dealer that hosts and manages these offerings.

The other version is the private Cloud, where it is deployed within the initiatives and managed and

maintained by the organization itself. A private cloud is a collection of virtualized infrastructure textiles

that are coupled with automated management. It is deeply integrated with the application platform and

identity, protection and access technologies to create an internal service-oriented environment for

initiatives.

Although the private cloud does not offer advantages with the hypervisor capability becoming integral

to the operating system, it is becoming increasingly affordable for initiatives.6

A more recent, new concept in Cloud computing is the hybrid Cloud, which is a blend of the public and private

Cloud. The hybrid Cloud, created by the enterprise, can influence the benefits provided by both public and

private Clouds. However, issues related to the sharing of responsibilities between the enterprise and the third

party vendor and governing such a Cloud, make it a slightly complex deployment option.

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Cloud Computing Layers

To understand Cloud computing, we need to understand in details about the three layers of cloud

computing. They are:

• Infrastructure-as-a-Service (IaaS)

• Platform-as-a-Service (PaaS)

• Software-as-a-Service (SaaS)8

Infrastructure as a Service

This layers is also called as Infrastructure service layer. In the instance of IaaS, servers, network devices,

and storage disks are made available to groups as services on a need-to basis. Virtualization, allows IaaS

providers to offer almost unlimited requests of servers to clients, while making cost-effective use of the

hosting hardware.

Companies can use IaaS to build new versions of without having to invest in physical IT assets.

Increasingly, organizations are using IaaS to host their websites, monitor their traffic and keep them

running, without monopolizing up IT resources. IaaS is particularly beneficial for micro, small and

medium-sized businesses that can access server and storage systems, which they would otherwise have

to purchase.

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Some of the key concepts of IaaS include:

• Cloud bursting

• Multi-tenant computing

• Resource pooling

• The hypervisor

Most importantly, the two primary facets that make IaaS special: elasticity and virtualization.

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Platform-as-a-Service

This layers is also called as Platform layer. This layer provides a platform for creating applications. PaaS

solutions are fundamentally developed platforms for which the development tool itself is hosted in the

Cloud and retrieved through a browser. With PaaS, developers can build Web applications without

installing any tools on their computers and then deploy those applications without any generalized

systems administration skills.

Today, PaaS is being delivered like a utility over the Internet, with corporate IT departments, paying

according to usage. Owing to PaaS, there has been a barrier in the number of people who can develop,

maintain and deploy web-based applications without requiring specialized skills.

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The defining factor that makes PaaS unique is that it lets developers build and deploy web applications

on a hosted infrastructure. In other words, PaaS allows you to leverage the seemingly infinite compute

resources of a cloud infrastructure.

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Software-as-a-Service

This layers is also called as Application layer. This layer includes applications that run off the Cloud and

are available to Web users on anytime and on anywhere basis. Explore the four primary factors that drive

return on investment for Software as a Service developers and how those factors are leveraged to make

SaaS profitable for stakeholders. In this final article of a three-part series, discover the business model

opportunities that SaaS presents and gain insight into the role of user experience design for SaaS

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