1. Understanding Cloud Computing
Sartaj Fatima
Lecturer, MIS Dept,
College of Business Administration
King Saud University, K.S.A
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Understanding Cloud Computing

2. Understanding Cloud Computing
Contents :
Introduction
History
Architecture
Key features
Service models
Deployment models
How to work the cloud computing
Growth of cloud computing
Advantages and disadvantages
Conclusion
“This chapters provide an overview of introductory cloud computing topics. It begins with a brief history of cloud computing along with short descriptions of its business and technology drivers. This is followed by definitions of basic concepts and terminology, in addition to explanations of the primary benefits and challenges of cloud computing adoption.”
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3. Understanding Cloud Computing
Introduction
Cloud computing is a model for enabling convenient on demand network access to share a pool of configurable computing resources.
That can be rapidly provisioned and released with minimal management effort or service provider interaction.
The essential features are service models and deployment models
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4. What is cloud computing ?
Understanding Cloud Computing
What is cloud computing ?
Use of a network of remote servers which are hosted on the internet in order to store, manage & process data rather than using a local server or personal computer.
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5. Understanding Cloud Computing
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6. Understanding Cloud Computing
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7. Understanding Cloud Computing
History
The concept was born in the 1960s from the ideas of pioneers like J.C.R Licklider
The John mcCaurthy form a global net work computation and framing computation as a public utility
Flash forward to 1997,when the term “Cloud Computing” was used by first information systems professor Ramnath chellappa Within a just a few years, companies began switching from hardware to cloud services
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8. Why Cloud- As basic Business Scenarios
Understanding Cloud Computing
Why Cloud- As basic Business Scenarios
Fast Application Deployment.
Hassle Free Maintenance.
Better Resources Utilization.
Platform Independent, Security, Scalability
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9. Understanding Cloud Computing
Cloud Architecture
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10. Understanding Cloud Computing
Cloud Architecture
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11. Understanding Cloud Computing
Key Characteristics
Data stored on the cloud.
Software and services on the cloud-Access via web browsers.
Broad network access.
Accessible from any devices.
Low cost software.
Advances security technologies.
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12. Cloud Computing Services
Understanding Cloud Computing
Cloud Computing Services
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13. Understanding Cloud Computing
Models of Cloud
The most recent achievements are the following models:
Cloud Software as a Service (SaaS)
use providers application over a network
Cloud Platform as a Service (PaaS)
Deploy customer created application to cloud
Cloud Infrastructure as Service (IaaS)
Rent processing, storage network capacity,
and other fundamental computing resources.
Cloud Hardware as a Service (HaaS)
Reduce cost, less failure and crashes
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14. Understanding Cloud Computing
Latest Examples
Software as a Service:
Salesforce.com
Gmail
Facebook
Platform as a Service:
3Tera
Google application engine
Caghead
Infrastructure as a Service:
Amazone AWS
Joyent
Mosso
Nirvanix
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15. Understanding Cloud Computing
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16. Enterprise Level Benefits Achieved From Cloud Computing
Understanding Cloud Computing
Enterprise Level Benefits Achieved From Cloud Computing
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17. Understanding Cloud Computing
Deployment models
The cloud deployment models define the purpose of the cloud and nature of how the cloud is located there are four basic models
Private model
Public model
Community model
Hybrid model
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18. Understanding Cloud Computing
1. Private cloud
Private cloud or internal cloud are neologisms that some vendors have recently used to describe offerings that emulate cloud computing on private networks. These (typically virtualization automation) products claim to "deliver some benefits of cloud computing without the pitfalls",.
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19. Understanding Cloud Computing
2. Public cloud
Public cloud or external cloud describes cloud computing in the traditional mainstream sense, whereby resources are dynamically provisioned on a fine-grained, self-service basis over the Internet, via web applications/web services, from an off-site third-party provider who shares resources and bills on a fine-grained utility computing basis.
A public cloud sells services to anyone on the Internet. (Currently, Amazon Web services is the largest public cloud provider.)
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20. Understanding Cloud Computing
3. Community model
The cloud infrastructure shared by several organization and supports a specific community that shared concerns.
example : mission , security requirements , policy , and compliance consideration
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21. Understanding Cloud Computing
4. Hybrid cloud
A hybrid cloud environment consisting of multiple internal and/or external providers "will be typical for most enterprises". By integrating multiple cloud services users may be able to ease the transition to public cloud services while avoiding issues such as PCI compliance.
Hybrid cloud basically combines both public and private cloud models together.
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22. How Cloud Computing Works ?
Understanding Cloud Computing
How Cloud Computing Works ?
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23. Cloud Computing Growth Rate
Understanding Cloud Computing
Cloud Computing Growth Rate
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24. Understanding Cloud Computing
Advantages
Fast application deployment.
Hassel free maintenance.
Better resource utilization.
Platform independent, security, scalability.
Backup and recovery.
Easy access to information.
Almost unlimited storage
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25. Understanding Cloud Computing
Disadvantages
Must have stable internet.
Slower than local software.
Concern about reliable and security.
Phone to attack.
Inflexibility
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26. Understanding Cloud Computing
Why Cloud Computing ?
Business Drivers.
Capacity Planning
Organizational Agility
Cost Reduction
Technology Innovations.
Clustering
Grid Computing
Virtualization
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27. Virtualization Principles
Understanding Cloud Computing
Virtualization Principles
Server virtualization separates software from hardware.
The low-layer virtualization software abstracts a virtual hardware interface by means of space segmentation, timed division, and emulation to provide the upper-layer OSs with an expected hardware environment.
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28. Virtualization Implementation
Understanding Cloud Computing
Virtualization Implementation
VMM virtualizes three types of physical resources: CPU, memory, and I/O device. CPU virtualization is the most important.
We will go through: .
CPU virtualization.
Memory virtualization.
I/O device virtualization.
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29. Technology Innovations vs. Enabling Technologies
Understanding Cloud Computing
Technology Innovations vs. Enabling Technologies
These are distinguished as cloud-enabling technologies:
Broadband Networks and Internet Architecture.
Data Center Technology.
(Modern) Virtualization Technology.
Web Technology.
Multitenant Technology.
Service Technology.
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30. Basic Concepts and Terminology
Understanding Cloud Computing
Basic Concepts and Terminology
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31. Understanding Cloud Computing
A Cloud refers to a distinct IT environment that is designed for the purpose of remotely provisioning scalable and measured IT resources.
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Figure 1.1 The symbol used to denote the boundary of a cloud environment.

32. Understanding Cloud Computing
IT Resource
An IT resource is a physical or virtual IT-related artifact that can be either software based, such as a virtual server or a custom software program, or hardware-based, such as a physical server or a network device
( figure 1.2 )
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Figure 1.2 Examples of common IT resources and their corresponding symbols

33. Understanding Cloud Computing
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Figure 1.3 A cloud is hosting eight IT resources three virtual servers, two cloud services, and three storage devices.

34. Understanding Cloud Computing
Scaling
Scaling from an IT resource perspective, represents the ability of the IT resource to handle increased or decreased usage demands.
The following are types of scaling:
Horizontal Scaling - scaling out and scaling in
Vertical Scaling - scaling up and scaling down
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35. Understanding Cloud Computing
HS & VS comparison
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36. Understanding Cloud Computing
Cloud Service
A cloud service is any IT resource that is made remotely accessible via cloud.
Unlike other IT fields that fall under the service technology umbrella - such as service - oriented architecture - the term "service" within the context of cloud computing is especially broad.
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