A NEW ERA OF COMPUTING

CLOUD COMPUTING

PRASHANT DESHPANDEServer Administrator

Maharashtra Knowledge Corporation Limited

What is Cloud Computing ?

DOES IT MEANS SITTING ON THE CLOUDS : OBVIOUSLY NO!!!

Cloud Computing : Overview

Instead of managing computer hardware & software inside your

company's network,

it's provided for you as a service by another company and accessed

over the Internet.

Like networks, servers, storage, applications, services.

“Pay as per Usage” model.

Service delivery models of Cloud : -

Software as a service. (SaaS)

Platform as a service.(PaaS)

Infrastructure as a service(IaaS)

Software as a service(SaaS)

Software delivery model.

With SaaS, a provider licenses an application to customers as a

service on demand, through a subscription.

„Pay as per use‟ model.

Enables customers to access applications remotely via the Internet.

SaaS : Key Characteristics

Network-based access & management of software.

Activities managed from central locations rather than at each

customer's site.

Centralized Updating, which obviates the need for end-users to

download patches and upgrades.

Application delivery is one-to-many model (single instance, multi-

tenant architecture).

SaaS Applications

Simple Example is of E-Mail.

Anyone can access their email from anywhere in the world simply by

knowing the web address . E.g. www.gmail.com

No need to know the name of the server or an IP address .

Customers don‟t have to worry about managing their mails , handled

by the mail provider automatically.

SaaS : Multi- Tenant Model

SaaS Applications

SaaS Benefits

Financial Benefits

Ease of Use

Centralized Data

Maintenance free.

Upgrades/Patches

Platform as a service(PaaS)

Delivery of Computing Platform as a service.

PaaS enables deployment of applications w/o the cost & complexity

of buying & managing the underlying hardware and software.

PaaS : provides platform for application design, development

, testing, deployment and hosting etc.

PaaS Applications

Preparing documents over the Net. E.g.. Google Docs .

Using Google Documents you can create documents, spreadsheet,

presentations etc.

The document you produce is stored remotely, on a Web server, so

you can access it from any Internet-connected computer, anywhere in

the world, any time you like.

Development & Testing : - platform for development & testing cycles

of application development.

………etc

PaaS Benefits

Simplified Deployment : Developers can focus on development and

innovation without worrying about the infrastructure.

Lower Risk : No up-front investment in hardware and software means

lower risk. Developers only need a PC and an Internet connection to

start building applications.

No More Software Upgrades : The PaaS provider manages

upgrades, patches, and other routine system maintenance.

Infrastructure as a service(IaaS)

Delivery of computer Infrastructure as a service.

Servers, software, data-center space or network equipment

, provided by vendors.

Clients buy those resources as a fully outsourced service.

Vendors typically bill such services on a utility computing basis and

amount of resources consumed.

IaaS : Key Characteristics

Customers can buy the infrastructure according to requirements at

any particular point of time.

IaaS operates on a “Pay as per use” model ensuring that the users

pay for only what they are using.

Virtualization enables IaaS providers to offer almost unlimited

instances of servers to customers.

Thus dynamic scaling, usage based pricing, reduced costs and

access to superior IT resources are some of the benefits of IaaS .

IaaS ,PaaS, SaaS : A Comparison

IaaS Benefits

Reduced Cost

Centralized Administration

Instant Scalability

Zero Maintenance

FYJC 2010 : A CASE STUDY

FYJC 2010

In 2010, MKCL received project for Junior College Admissions for

Mumbai region (FYJC).

Number of candidates were more than 2.5 lacs.

Project involved , form filling & submission by students on the basis

of which colleges were to be allotted from the software.

FYJC 2010 : Strategies

Setting up a Web Farm : multi-server scenario.

Involved dynamically allocating web servers to share load of heavy

traffic on the website.

In FYJC 2010 : Total of 9 virtualized web servers were allocated on

which the website was hosted.

The web servers were hosted on a private cloud along with the

physical database servers.

FYJC Admissions 2010 (IaaS)

FYJC 2010 Statistics

Summary of Statistics for 2 months

Total Hits 150+ million

Total Bandwidth Used 350 GB

Cloud Computing : Benefits

Potentially reduce cost of infrastructure, buildings, power, andstaffing.

Pay per use.

Turn fixed cost into variable cost .

Instant Scalability.

Centralized Administration.

Faster Application Rollout.

Improve Productivity & Innovation .

Cloud Service Providers

Ready to push the cloud button ?