1. CLOUD COMPUTING
A NEW ERA OF COMPUTING
PRASHANT DESHPANDE
Server Administrator
Maharashtra Knowledge Corporation Limited

2. What is Cloud Computing ?
DOES IT MEANS SITTING ON THE CLOUDS : OBVIOUSLY NO!!!

3. 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.

5. Service delivery models of Cloud : -
 Software as a service. (SaaS)
 Platform as a service.(PaaS)
 Infrastructure as a service(IaaS)

6. 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.

7. 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).

8. 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.

9. SaaS : Multi- Tenant Model

10. SaaS Applications

11. SaaS Benefits
Financial Benefits
Ease of Use
Centralized Data
Maintenance free.
Upgrades/Patches

12. 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.

13. 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

15. 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.

16. 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.

17. 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 .

18. IaaS ,PaaS, SaaS : A Comparison

20. IaaS Benefits
Reduced Cost
Centralized Administration
Instant Scalability
Zero Maintenance

22. FYJC 2010 : A CASE STUDY

23. 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.

24. 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.

25. FYJC Admissions 2010 (IaaS)

26. FYJC 2010 Statistics
Summary of Statistics for 2 months
Total Hits 150+ million
Total Bandwidth Used 350 GB

27. Cloud Computing : Benefits
 Potentially reduce cost of infrastructure, buildings, power, and
staffing.
 Pay per use.
 Turn fixed cost into variable cost .
 Instant Scalability.
 Centralized Administration.
 Faster Application Rollout.
 Improve Productivity & Innovation .

28. Cloud Service Providers

29. Ready to push the cloud button ?