With cloud computing, the s/w programs one use
aren’t run from one’s personal computer, but are
rather stored on servers accessed via the
If a computer crashes, the s/w is still available
for others to use. Same goes for the documents
on create; they are stored on a collection of
servers accessed via the internet.
Cloud Computing model isn’t PC-centric, its
The Cloud in cloud computing provides the mean
through which everything- from computing power
to computing infrastructure, applications, business
processes to personal collaboration – can be
deliver to you as a service wherever n whenever
App App App
Key Technology: Virtualization
Pay per usescalability
We have focused on cloud service providers
whose data centers are external to the users
of the service (businesses or individuals).
These clouds are known as public clouds—both
the infrastructure and control of these clouds
is with the service provider.
A variation on this scenario is the private cloud.
Here, the cloud provider is responsible only for
the infrastructure and not for the control. This
setup is equivalent to a section of a shared data
center being partitioned for use by a specific
customer. The private cloud can offer SAAS,
PAAS, or IAAS services, though IAAS might
appear to be a more natural fit.
A hybrid cloud involves data centers storing secure
and important data on the enterprise premises and
less important data to be stores at a remote
location in the cloud. So it is a mixture of public
and private cloud that yields the most benefit.