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CLOUD COMPUTING
Monday, July 15, 2013 @ 9:54 PM | 0 Comment [s]
Cloud
computing is a type of computing that relies on sharing computing resources
rather than having local servers or personal devices to handle applications.
In cloud
computing, the word cloud (also phrased as "the
cloud") is used as a metaphor for "the Internet," so the
phrase cloud computing means "a type of Internet-based
computing," where different services -- such as servers, storage and
applications -- are delivered to an organization's computers and devices
through the Internet.
Cloud
computing is comparable to grid computing, a type of computing where
unused processing cycles of all computers in a network are harnesses to solve
problems too intensive for any stand-alone machine.
ADVANTAGE
Cloud
computing relies on sharing of resources to achieve coherence and economies
of scale similar
to a utility (like the electricity grid) over a network.[2] At the foundation of cloud
computing is the broader concept of converged infrastructure and shared services.
The cloud
also focuses on maximizing the effectiveness of the shared resources. Cloud
resources are usually not only shared by multiple users but as well as
dynamically re-allocated as per demand. This can work for allocating resources
to users in different time zones. For example, a cloud computer facility which
serves European users during European business hours with a specific
application (e.g. email) while the same resources are getting reallocated and
serve North American users during North America's business hours with another
application (e.g. web server). This approach should maximize the use of
computing powers thus reducing environmental damage as well, since less power,
air conditioning, rackspace, and so on, is required for the same functions.
The term
moving cloud also refers to an organization moving away from a traditional
capex model (buy the dedicated hardware and depreciate it over a period of
time) to the opex model (use a shared cloud infrastructure and pay as you use
it)
Proponents
claim that cloud computing allows companies to avoid upfront infrastructure
costs, and focus on projects that differentiate their businesses instead of
infrastructure. Proponents also claim that cloud computing allows enterprises
to get their applications up and running faster, with improved manageability
and less maintenance, and enables IT to more rapidly adjust resources to meet
fluctuating and unpredictable business demand.
HOW
CLOUD COMPUTING WORKS
The goal
of cloud computing is to apply traditional supercomputing, or high-performance
computing power,
normally used by military and research facilities, to perform tens of trillions
of computations per second, in consumer-oriented applications such as financial
portfolios, to deliver personalized information, to provide data storage or to
power large, immersive computer games.
To do
this, cloud computing uses networks of large groups of servers typically running low-cost
consumer PC technology with specialized connections to spread data-processing
chores across them. This shared IT infrastructure contains large pools of systems
that are linked together. Often, virtualization techniques are used to maximize
the power of cloud computing.
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