What is the Cloud computing technolgy ?
Cloud computing is an expression used to describe a
variety of computing concepts that involve a large number of
computers connected through a real-time communication network such as the Internet. The phrase also more commonly refers to
network-based services, which appear to be provided by real server hardware,
and are in fact served up by virtual hardware, simulated by software running on
one or more real machines. Such virtual servers do not physically exist and can
therefore be moved around and scaled up (or down) on the fly without affecting
the end user - arguably, rather like a cloud. In science, cloud computing is a
synonym for distributed
computing over a network, and means the ability to run a program or application
on many connected computers at the same time.
The popularity of the term can be
attributed to its use in marketing to sell hosted services in the sense of application service provisioning that run client server software on a remote location.
The best advantages of Cloud computing are : this technology relies
on sharing of resources to achieve coherence and economies
of scale, similar to a utility over a network. At the foundation of cloud computing is the
broader concept of converged infrastructure and shared services.
In marketing, cloud computing is mostly
used to sell hosted services in the sense of application service provisioning that run client server software at a remote location. Such
services are given popular acronyms like 'SaaS' (Software as a Service), 'PaaS'
(Platform as a Service), 'IaaS' (Infrastructure as a Service), 'HaaS' (Hardware
as a Service) and finally 'EaaS' (Everything as a Service). End users access
cloud-based applications through a web browser, thin client or mobile app while the business software and user's data are stored on servers at a
remote location. Examples include Amazon web services and Google App engine
which allocate space for a user to deploy and manage software "in the
cloud".
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