Cloud computing refers to applications and services delivered over the Internet. It provides on-demand access to shared computing resources like servers, storage, databases and software that can be provisioned with minimal management effort. Major cloud service models include SaaS, PaaS and IaaS. The cloud computing market is growing rapidly with major players like Amazon, Microsoft and Google dominating different segments. Emerging services like STaaS, Daas and Caas are facilitating wider cloud adoption.

1. Cloud Computing
Deepak Shukla
MSc Information Technology
The Hong Kong University of Science & Technology

2. What is Cloud Computing?
1. Definitions – What’s new?
2. The Entities in Cloud Computing – Who
makes it happen?
3. The Computational Model – How does it
work?
4. The Business Model – What’s the Profit?
5. Advantages: Why adopt Cloud Computing?
6. Obstacles: Why not?

3. Definitions
• Cloud Computing refers to both the applications
delivered as services over the internet and the
hardware and software in the Datacenters that
provide these services.
• A model for enabling convenient, on-demand
network access to a shared pool of configurable
computing resources that can be rapidly
provisioned and released with minimal
management effort or service provider
interaction.

4. Definitions (contd..)
• Cloud Computing is the delivery of
computational resources from the location
other than your current one.
• Cloud computing is the delivery of computing
as a service rather than a product, whereby
shared resources, software and information
are provided to computers and other devices
as a utility (like the electricity grid) over a
network (typically the Internet). - Wikipedia

5. What is a Cloud anyways?
• “Cloud” is nothing but the hardware and
software resources used to provide various
services to the end users.
• It is the backbone infrastructure that is used
to provide various on-demand services over
the Internet.
• The term "cloud" is used as a metaphor for
the Internet; as an abstraction of the
underlying infrastructure that it represents.

6. Entities

7. The Computational Model

8. Cloud Services
• SaaS: Software-as-a-Service is a term used for the
software applications that are delivered over the
internet by the Cloud Provider. E.g. Google Docs
• PaaS: Platform-as-a-Service provides an
underlying platform/OS enabling the user to
develop and deploy applications that are created
using the languages and tools supported by the
Cloud provider. E.g Windows Azure, Force.com

9. Cloud Services (contd..)
• IaaS: Infrastructure-as-a-Service covers the
provisioning of all the possible computational
resources like computational power, storage
capacity, applications and other fundamental
computing resources. E.g. Amazon, IBM,
Microsoft Azure.

10. The Business Model: What’s the Profit
• In general “huge cost savings”.
• Basically “Pay-as-you-go” service model for all
types of services provided through the Cloud
infrastructure.
• No premium licensing charges or maintenance
charges for the software applications,
hardware and storage services that are used
by the Cloud users or consumers.

11. The Business Model: What’s the Profit
contd…
• Businesses can focus on their core
competencies by using IT services as an
effective tool rather than spending too much
on it.
• Cloud Computing improves IT efficiency and
business agility.
• Reduces the need for huge upfront
investments that characterize enterprise IT
setups today.

12. The Business Model: What’s the Profit
contd…
• Dramatically lowers the cost of entry for
smaller firms trying to benefit from compute-
intensive business analytics.
• Almost immediate access to computing
resources with prior provisioning and on-
demand leading faster time-to-market in
many businesses.
• Lowers IT barriers to innovation.
• Most importantly promotes “Green IT”.

13. Why adopt Cloud Computing?
• Huge cost savings in operation, maintenance
and IT infrastructure.
• Transfers risk of over-provisioning or under-
provisioning of IT resources and thus increases
IT efficiency.
• Focus on core business.
• Very attractive for end users and SME’s due to
its economics of scale and utilitarian nature.

14. Obstacles in adopting Cloud
Computing – Why not?
• Availability of Service over Internet
• Data Lock-in : No standard format yet like
HTML, XML etc.
• Data Confidentiality and Auditability
• Data Transfer Bottlenecks
• Performance Unpredictability
• Scalable Storage – suitable storage system yet
to come.

15. Obstacles in adopting Cloud
Computing – Why not?
• Bugs in Large-Scale Distributed Systems
• Scaling quickly
• Reputation Fate Sharing
• Software Licensing
• Regulation & Standardization Issues.

16. More about Clouds
Yang Xing
MSc Information Technology
The Hong Kong University of Science & Technology

17. Service Models
• Infrastructure as a Service(IaaS)
– Provider offer virtual machine, raw storage,etc
– User install os, application sw
• Platform as a Service(Paas)
– Provider deliver computing platform or stack
– User develop and run their software solutions
• Software as a Service(SaaS)
– Provider install, operate applicatio software
– User access software from cloud clients

18. Deployment Models
• Public Cloud
– Available to general public
– Free or Pay-per-Use
• Community Cloud
– Shared between several organizations from a
– specific community with common concerns
• Private Cloud
– Operated solely for a single organization
– Managed internally or by third-party
• Hybrid Cloud
– Compositions of two or more clouds

19. Latest Trends in Cloud Market
Nishita Menon
MSc Information Technology
The Hong Kong University of Science & Technology

20. Major players in Cloud Services
 Amazon Web Services
• IaaS
 Microsoft Windows Azure
• PaaS
 Google App Engine
• SaaS
SOURCE :
http://www.cloudcomputingtechie.com/co
mpanies-providing-cloud-based-services/

21. Revenues from Cloud business and the
growth rate predicted
 SaaS
• Predicted to reach$14.5 billion in
2012, a 17.9 % increase from 2011
revenue of $12.3 billion.
• Revenue in the Asia-Pacific region is
on pace to reach $934.1 million in
2012, up from $730.9 million in 2011.
 PaaS
• Revenue reached $707.4 million in
2011, up from $512.4 million in 2010
• Predicted to reach $1.8 billion in 2015
 IaaS
• By 2013, service revenues from IaaS
are forecast to be approximately $15.6
billion
Source : http://www.gartner.com and
http://www.cisco.com

22. Derivative service models that are
emerging as a result of growing Cloud
adoption
 STaaS (Software Testing as a Service)
• provides an accessible,flexible and low-cost test solution – on demand outsourcing
without the high levels of investment.
 Security as a Service
• outsourcing model for security management.
 Daas (Data as a service)
• data in this case, can be provided on demand
 Caas (Computing as a service)
• on-demand computing platform

23. Emerging Cloud Services to facilitate
Cloud Adoption – Cloud Mediators
 Infosys Cloud System Integrator
• an accountable cloud ecosystem integrator.
• takes ownership of the complete lifecycle of your
cloud initiative.
• hosts, manages and operates business platforms.
• provides comprehensive services from
• strategy,
• planning,
• cloud set-up to
• migration , creation and aggregation of cloud services.
• addresses all aspects of cloud adoption, reducing total
cost of ownership.