You may have heard the
term cloud computing or ‘the Cloud,’ but could you describe what it is?
There are so many definitions flying around that you wouldn’t be alone
if you struggled to define it. Cloud computing is simply a set of pooled
computing resources and services delivered over the web. When you
diagram the relationships between all the elements it resembles a cloud.
Cloud computing—not to be confused with
grid computing, utility computing, or autonomic computing—involves the
interaction of several virtualized resources. Cloud Servers™ connect and
share information based on the level of website traffic across the
entire network. Cloud computing is often provided “as a service” over
the Internet, typically in the form of infrastructure as a service
(IaaS), platform as a service (PaaS), or software as a service (SaaS).
Cloud computing customers don’t have to
raise the capital to purchase, manage, maintain, and scale the physical
infrastructure required to handle drastic traffic fluctuations. Instead
of having to invest time and money to keep their sites afloat, cloud
computing customers simply pay for the resources they use, as they use
them. This particular characteristic of cloud computing—its
elasticity—means that customers no longer need to predict traffic, but
can promote their sites aggressively and spontaneously. Engineering for
peak traffic becomes a thing of the past.
Source: [RackSpaceCloud]
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