Page 41 - DCAP609_CLOUD_COMPUTING

Cloud Computing

Notes known or unexpected workloads, long term computing and technical needs or for routine work.
Web services and other specialised tasks are referred to as types of ODC.
On-demand (OD) computing is an increasingly popular enterprise model in which the resources
provided to the user may be maintained within the user’s enterprise, or made available by a
service provider.

Also understood as utility computing or OD Computing, ODC is defined as the “pay and use”
computing power.
On-demand computing products are rapidly becoming prevalent in the marketplace. Computer
Associates, HP, IBM, Microsoft, and Sun Microsystems are among the more noticeable
on-demand vendors. These companies refer to their on-demand products and services by a
variety of names. IBM calls theirs “On Demand Computing” without the hyphen.
The most significant advantage of ODC is its low initial cost. This happens because computational
resources are usually rented when needed. This method is cost efficient. This provides cost
savings over purchasing them outright. The on-demand computing model was developed to
overcome the common challenge that enterprises encountered of not being able to meet
unpredictable, fluctuating computing demands in an efficient manner. Businesses today need to
be active and need the ability to scale resources easily and quickly based on rapidly changing
market needs. Because an enterprise’s demand for computing resources can vary dramatically
from one period of time to another, maintaining sufficient resources to meet peak requirements
can be costly. However, with on-demand computing, companies can cut costs by maintaining
minimal computing resources until they run into the need to increase them, meanwhile only
paying for what they use.
Operating in an on-demand computing enterprise model allows licensing costs to decrease if
the applications are configured in a terminal services environment. The licenses are available as
needed but in some cases can be kept in a pool to allow all users to pull from the available copies
only when the application is used, reducing the total license count.
In previous years, on-demand computing was provided from a single server via some sort of
time-sharing arrangement. Today, the service is based on large grids of computers operating as
a single cloud.
In June 2011, the Telecommunications Industry Association developed a Cloud Computing
White Paper, to analyze the integration challenges and opportunities between cloud services
and traditional U.S. Telecommunications standards.

Task Explain on demand computing with the help of a diagram.

3.4 Discovering Cloud Services Development Services and Tools

Cloud computing is at a development stage at present. There are many companies offering
Cloud Computing services to the enterprise clients and individuals.
In a more established industry, with giants coming to the forefront, the smaller companies
struggle to make their existence felt. Cloud service development services and tools are offered
by a variety of big and small companies. Cloud-based hosting for applications developed from
scratch are the most basic services offered. The more fully featured offerings include development
tools and pre-built applications that can be used by developers to build their own unique Web
based applications.

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