What Is This Cloud Computing
Cloud computing is Internet-based computing, whereby
shared resources, software and information are
provided to computers and other devices on-demand.
Cloud computing describes a new supplement,
consumption and delivery model for IT services based
on Internet, and it typically involves the provision of
dynamically scalable and often virtualized resources
as a service over the Internet.
Grid to Cloud Evolution
• Grid Computing:Solving large problems with Parallel computing
Made mainstream By Global Alliance
• Utility Computing :Offering computing resources as a metered service
Introduced in late 1990s
• SaaS Computing:Network-based subscriptions to applications
Gained momentum in 2001
• Cloud Computing:Next-Generation Internet computing
Next-Generation Data Centers
Uses Of Cloud Computing
• - Helps to use applications without installations.
• - Access the personal files at any computer with internet
• - This technology allows much more efficient
computation by centralizing storage, memory, processing
and band width.
A CLOUD CLIENT consists of computer hardware and/or computer
software that relies on cloud computing for application delivery.
• Cloud application services or "Software as a Service (SaaS) "
deliver software as a service over the Internet, eliminating the need
to install and run the application on the customer's own computers
and simplifying maintenance and support.
• Cloud platform services or "Platform as a
Service (PaaS)" deliver a computing platform
and/or solution stack as a service, often
consuming cloud infrastructure and sustaining
• It facilitates deployment of applications without
the cost and complexity of buying and managing
the underlying hardware and software layers.
Cloud infrastructure services or "Infrastructure as a
service(laas)” delivers computer infrastructure, typically
a platform virtualization enviroment, as a service, rather
than purchasing servers, software, data centre space or
network equipments, clients instead buy those resources
as a fully outsourced service. The service is typically
billed on a utility computing basis and amount of
resources consume (and therefore the cost) will typically
reflect the level of activity.it is an evolution of virtual
private server offerings.
The servers layer consists of computer hardware
and/or computer software products that are specifically
designed for the delivery of cloud services, including
multi-core processors, cloud-specific operating systems
and combined offerings.
COMMUNITY CLOUD:• A community cloud may be established where several organizations
have similar requirements and seek to share infrastructure so as to
realize some of the benefits of cloud computing.
HYBRID CLOUD:• A hybrid cloud environment consists of multiple internal
and/or external providers"be typical for most enterprises".By
integrating multiple cloud services, users may be able to ease the
transition to public cloud services.
•PUBLIC CLOUD:• Public cloud applications, storage, and other resources are
made available to the general public by a service provider.
These services are free or offered on a pay-per-use model.
Generally, public cloud service providers like Amazon AWS,
Microsoft and Google own and operate the infrastructure and
offer access only via Internet
PRIVATE CLOUD:• Private cloud and Internal cloud are expressions that some vendors
have recently used to describe offerings that emulate cloud
computing on private networks.
• These products claim to "deliver some benefits of cloud
computing with out the pitfalls", capitalizing on data security,
corporate governance, and reliability concerns. They have been
criticized on the basis that users“ still have to buy, build, and
manage them“ and as such do not benefit from lower up-front
capital costs and less hands-on management.
• The Cloud model has been criticized by privacy advocates
for the greater ease In which the companies hosting the Cloud
services control, and thus, can monitor at will, lawfully
or unlawfully, the communication and data stored between the
user and the host company. Instances such as the secret NSA
program, working with AT&T, and Veriz, which recorded over 10
million phone calls between American citizens, causes
uncertainty among privacy advocates, and the greater powers it
gives to telecommunication companies to monitor user activity.
SECURITY:• The relative security of cloud computing services is a contentious
issue which may be delaying its adoption. Some argue that
customer data is more secure when managed internally, while
others argue that cloud providers have a strong incentive to
maintain trust and as such employ a higher level of security.
CONCLUSION:• Cloud computing is a better way to run your business. Instead of
running your apps yourself, they run on a shared data centre. When
you use any app that runs in the cloud, you just log in, customize it,
and start using it. That’s the power of cloud computing.
• Finally, cloud apps don’t eat up your valuable IT resources. This
lets you focus on deploying more apps, new projects, and