2. What is Cloud Computing?.
• An environment created in a user’s machine
from an on-line application stored on the
cloud and run through a web browser.
• In simple Cloud computing is using the
internet to access someone else's software
running on someone else's hardware in
someone else's data center.
3. Cloud Computing- CONCEPT
Cloud computing refers to the use and access of multiple server-based
computational resources via a digital network (WAN), Internet connection
using the World Wide Web etc.. Cloud users may access the server resources
using a computer, netbook, pad computer, smart phone, or other device.
In cloud computing, applications are provided and managed by the cloud
server and data is also stored remotely in the cloud configuration. Users do
not download and install applications on their own device or computer; all
processing and storage is maintained by the cloud server. The on-line services
may be offered from a cloud provider or by a private organization.
4. Cloud Computing Services
• Software as a Service (SaaS)-End Users
• Platform as a Service (PaaS)-Application Developers
• Infrastructure as a Service (IaaS)-Network Architects
5. Software as a Service-End Users
Just run it for me!
also known as On-demand Service.
is an application that can be accessed from anywhere on the
world as long as you can have an computer with an Internet
Connection.
We can access this cloud hosted application without any
additional hardware or software.
E.g. : G-mail, Yahoo mail, Hotmail etc..,
Also they can provide security features such as SSL encryption,
a cryptographic protocol.
6. Platform as a Service (PaaS)-
Application Developers
• Give us nice API (Application Programming Interface) and take care of the
implementation.
• In the PaaS model, cloud providers deliver a computing platform and/or
solution stack typically including operating system, programming language
execution environment, database, and web server.
• is a platform for developers to write and create their own SaaS i.e.
applications.
• which means rapid development at low cost.
• E.g.: Salesforce.com, Windows Azure etc.
7. Infrastructure as a Service (IaaS)-Network
Architect
• also known as hardware as a service.
• is a computing power that you can rent for a limited period of
time.
• allows existing applications to be run on a cloud suppliers
hardware.
• cloud providers offer computers – as physical or more often as
virtual machines – raw (block) storage, firewalls, load balancers,
and networks
10. HISTORY
Cloud computing is a natural evolution of the widespread
adoption of virtualization, service-oriented
architecture, autonomic, and utility computing. Details are
abstracted from end-users, who no longer have need for
expertise in, or control over, the technology infrastructure
"in the cloud" that supports them.
The actual term "cloud" borrows from telephony in that
telecommunications companies, who until the 1990s
offered primarily dedicated point-to-point data circuits,
began offering Virtual Private Network (VPN) services
with comparable quality of service but at a much lower
cost.
11. WHY CLOUD IS SO POPULAR:
To reduce the IT operations and management
costs
Cloud model of software architecture.
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.
12. Why Now?
• Experience with very large datacenters
• Other factors
• Pervasive broadband Internet
• Fast x86 virtualization
• Pay-as-you-go billing model
• Standard software stack
• Hardware VirtualizationRefers to the creation of a virtual machine
that acts like a real computer with an operating system
• Virtual Machine isA software implementation of a machine that
executes programs like a physical machine
• VM Technology
• Allows multiple virtual machines to run on a single physical
machine
12
13. Service Models
• Cloud computing providers offer their services according to
several fundamental models
14. ISSUES RELATED TO CLOUD
COMPUTING
Cloud computing may create a dependence on the provider
(Google, Amazon) and may make it difficult to move to
another platform.
Google itself admits that Google App Engine is targeted at
consumer applications, not businesses.
There’s always the risk that the Cloud provider may change
business models or even go out of business.
15. Key Characteristics
• On-demand self-service
• Users can obtain, configure and deploy cloud services without
requiring human interaction with each service’s provider
• Broad network access
• Capabilities are available over the network and accessed through
standard mechanisms
• Resource pooling
• The provider’s computing resources are pooled to serve multiple
consumers
16. Key Characteristics
• Rapid elasticity
• Gives the illusion of infinite computing resources available on
demand
• Rapidly provide resources in any quantity at any time
• Measured service
• Services must be priced on a short term basis allowing users to
release resources as soon as they are not needed
• Must implement features to allow efficient trading of service such
as pricing, accounting, and billing
18. Deployment Models
• Private Cloud
• Cloud infrastructure is operated solely for an organization
• Community Cloud
• Shared by several organizations and supports a specific community
that has shared concerns
• Public Cloud
• Cloud infrastructure is made available to the general public
• Hybrid Cloud
• Cloud infrastructure is a composition of two or more clouds
19.
20. PROS AND CONS :
ADVANTAGES:
Software as a Subscription
Reduced Software Maintenance
Increased Reliability
Environmentally Friendly
Cost Reduction
Portability/Accessibility
21. DISADVANTAGES:
Bandwidth could bust your budget
App performance could suffer
Data might not be cloud-worthy
Too big to scale
22. Future of CLOUD COMPUTING
The 55% of respondents believe that cloud computing
has a lower total cost of ownership (TCO).
74 percent of respondents indicated that cloud
computing would either lead to an increase in hiring or
have no impact, while rest of respondents expected any
decrease in hiring based on cloud adoption.
39 percent indicating that the cloud would make for
less or more complex environments.
23. Conclusions
• Cloud Computing is the fastest growing part of IT
• Tremendous benefits to customers of all sizes
• Cloud services are simpler to acquire and scale up or down
•Public clouds work great for some but not all applications
• Private clouds offer many benefits for internal applications
• Public and private clouds can be used in combination
