Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. Key characteristics of cloud computing include on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service. Commercial clouds provide infrastructure, platforms and software as services allowing users to access technology resources without owning them.

1. CLOUD COMPUTIING
By
KRISHNALAL K J
S5 MCA

2. Introduction
 Cloud computing is Internet-based computing, whereby shared resources,
software, and information are provided to computers and other devices on
demand, like the electricity grid.
 Cloud computing is a paradigm shift following the shift from mainframe to client–
server in the early 1980s. Details are abstracted from the users, who no longer
have need for expertise in, or control over, the technology infrastructure "in the
cloud" that supports them.

3. What Is Cloud Computing?
 Cloud computing is Internet based computing where virtual shared servers provide
software, infrastructure, platform, devices and other resources and hosting to customers
on a pay-as-you-use basis.
 All information that a digitized system has to offer is provided as a service in the cloud
computing model. Users can access these services available on the "Internet cloud"
without having any previous know-how on managing the resources involved.

4. History
 Concept originated from telecommunication companies changing to VPN
 1999:Salesforce. com ‐ Delivery of applications via web
 2002: Amazon launches Amazon Web Services (AWS)
 2006: Google Docs, Amazon Elastic Compute Cloud (EC2)
 2008: Eucalyptus
 2009: Microsoft Azure

5. Why cloud service is popular?
 Reduce the complexity of networks.
 Do not have to buy software licenses.
 Customization.
 Cloud providers that have specialized in a particular area (such as e-mail) can bring
advanced services that a single company might not be able to afford or develop.
 scalability, reliability, and efficiency.
 Info. at cloud are not easily lost.

7. Datacenter
It is collection of servers where application is placed and is
accessed via internet.

10. HOW YOUR DATA IS STORED

11. Essential characteristics of Cloud
Computing
Cloud
Computing
On-demand
self-service
Ubiquitous
network
access
Resource
pooling
Rapid
elasticity
Flexible
pricing - Pay
per use

12. Advantages of Cloud Computing
 Lower Computing Cost
 Improved Performance
 Reduced Software Cost
 Instant Software Updates
 Unlimited Storage Capacity
 Increased Data Reliability
 Device Independence and the “always on!, anywhere and any place”
 Free From Maintenance and the “no-need-to-know”

13. Disadvantages of Cloud Computing
► Cloud computing is impossible if you cannot connect to the Internet.
► Since you use the Internet to connect to both your applications and documents, if you do
not have an Internet connection you cannot access anything, even your own documents.
► A dead Internet connection means no work and in areas where Internet connections are
few or inherently unreliable, this could be a deal-breaker.
► When you are offline, cloud computing simply does not work.

14. Virtualization
 Virtual workspaces:
 An abstraction of an execution environment that can be made dynamically available to
authorized clients by using well-defined protocols,
 Resource quota (e.g. CPU, memory share),
 Software configuration (e.g. O/S, provided services).
 Implement on Virtual Machines (VMs):
 Abstraction of a physical host machine,
 Hypervisor intercepts and emulates instructions from VMs, and allows management of VMs,
 VMWare, Xen, etc.
 Provide infrastructure API:
 Plug-ins to hardware/support structures
Hardware
OS
App App App
Hypervisor
OS OS
Virtualized Stack

15. Virtual Machines
• VM technology allows multiple virtual
machines to run on a single physical
machine.
Hardware
Virtual Machine Monitor (VMM) / Hypervisor
Guest OS
(Linux)
Guest OS
(NetBSD)
Guest OS
(Windows)
VM VM VM
AppApp AppAppApp
Xen
VMWare
UML
Denali
etc.
Performance: Para-virtualization (e.g. Xen) is very close to raw physical
performance!
15

16. Virtualization in General
 Advantages of virtual machines:
 Run operating systems where the physical hardware is unavailable,
 Easier to create new machines, backup machines, etc.,
 Software testing using “clean” installs of operating systems and software,
 Emulate more machines than are physically available,
 Timeshare lightly loaded systems on one host,
 Debug problems (suspend and resume the problem machine),
 Easy migration of virtual machines (shutdown needed or not).
 Run legacy systems!

17. Cloud Service models - Characteristics
• Scalable; Multi-tenant; Metadata driven configurability
• Sometimes free; easy to use; good consumer adoption; proven
business models
Software as a Service
(SaaS)
• Highly scalable; multi-tier architecture; Multi tenant
environments
• Developers can upload a configured applications and it “runs”
within the platform’s framework
Platform as a Service
(PaaS)
• Offers full control of a company’s infrastructure; not confined to
applications or restrictive instances
• Sometimes comes with a price premium; can be complex to
build, manage and maintain
Infrastructure as a
Service (IaaS)

18. Cloud Service models - Containing

19. Cloud Service models - Examples

20. Cloud Operating Systems
► Eye OS
► Amoeba OS
► Glide OS
► Start force
► myGoya
► CorneliOS
► Lucid Desktop
► Cloudo, Ghost, Zimdesk, Start force etc.,

21. eyeOS

22. Glide OS

23. Types of Cloud Computing

25. Private Cloud
 Owned and managed by service provider
 Made available to the general public or a large industry group
 Operated solely for an organization
 May be managed by the organization or a third party
 Limits access to enterprise and partner network
 Retains high degree of control, privacy and security
 E.g. : HP data center, IBM, Sun, Oracle, 3tera

26. Community Cloud
 shared infrastructure by several organizations which have shared concerns
 May be managed by the organizations or a third party
 Costs are spread over fewer users than a public cloud but more than a single
tenant
 Eg;Amazon, Google, Microsoft, Sales force

27. Hybrid Cloud
 Composition of two or more clouds (private, community, or public) bound
together by standardized or proprietary technology that enables data and
application portability

28. Is Cloud Computing reduces E-Waste?.
► Green IT Cloud Computing
► Cloud Computing is Eco-Friendly.
► We can reduce E-waste by using Cloud Computing i.e. by Infrastructure as a
Service (IaaS).
► Cloud Computing Helps to Accelerate Green IT
► Can reduce Global Warming too..

29. Facebook DateCenter
Google Server

30. Commercial Clouds

31. Commercial Clouds

32. The Future
 Many of the activities loosely grouped together under cloud computing have already been
happening and centralised computing activity is not a new phenomena
 Grid Computing was the last research-led centralised approach
 However there are concerns that the mainstream adoption of cloud computing could
cause many problems for users
 Many new open source systems appearing that you can install and run on your local
cluster
 should be able to run a variety of applications on these systems

33. Conclusion
 Cloud Computing is the fastest growing part of network based computing . It
Provides tremendous benefits to customers of all sizes: simple users, developers,
enterprises and all types of organizations.