08-16-2017, 09:12 PM
CLOUD COMPUTING: A PERSPECTIVE STUDY
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INTRODUCTION:
.Coined in late of 2007
.Currently emerges as a hot topic due to its abilities
to offer flexible dynamic IT infrastructures, QoS
guaranteed computing environment and
configurable software services
.On-demand service provisioning
The computing Clouds provide resources and services for users
on demand. User can customize and personalize their computing
environments later on, for example, software installation, network
configuration, as users usually own administrative privileges.
.QoS guaranteed offer
oThe computing environments provided by computing Clouds
can guarantee QoS for users.
oThe computing Cloud renders QoS in general by processing
Service Level Agreement (SLA) with users a negotiation on the
levels of availability, serviceability, performance, operation, or
other attributes of the service like billing and even penalties in the
case of the SLA.
Autonomous System
The computing Cloud is an autonomous system and it is managed
transparently to users. Hardware, software and data inside clouds can
be automatically reconfigured, orchestrated and consolidated to present
a single platform image, finally rendered to users.
Scalability and flexibility
The scalability and flexibility are the most important features that drive
the emergence of the Cloud computing. Cloud services and computing
platforms offered by computing Clouds could be scaled across various
concerns, such as geographical locations, hardware performance,
software configurations. The computing platform should be flexible to
adapt to various requirements of a potentially large number of users.
4/6/2009
DEFINITION
At the current stage, the Cloud computing is still
evolving and there exists no widely accepted
definition. To help demystify the matter, the 2008
IEE International Conference on Web Service
(ICWS), held last September in Beijing, included a
panel, Cloud Computing and IT as a Service:
Opportunities and Challenges. It featured
presentation from three IT vendor giants Microsoft,
IBM, and Cisco addressing industry perspectives
and cloud computation initiatives.