Introduction to Cloud Computing · Cloud computing is the on-demand delivery of compute power, database, applications, storage, and ...
Introduction to Cloud Computing
· Cloud computing is the on-demand delivery of compute power, database, applications, storage, and other IT resources through a cloud service platform via the Internet, with pay-as-you-go pricing model.
Characteristics
of Cloud:
· On demand self
service
· Broad Network
Access
· Scalability
· Resource Pooling
· Measured
Services
Services
in Cloud:
· Infrastructure
as a Service (IAAS): Network to O.S
Ø Examples of
IaaS: Microsoft
Azure, Amazon Web Services (AWS), Cisco Metacloud, Google Compute Engine (GCE).
· Platform as a
Service (PAAS): Network to Runtime.
Ø Examples of PaaS: AWS Elastic Beanstalk,
Apache Stratos, Google App Engine, Microsoft Azur
· Software as a
Service (SAAS): Network to Application.
Ø Examples of
SaaS: Microsoft
Office 365, Salesforce, Cisco WebEx, Google Apps.
Deployment
model in Cloud:
·
Public Cloud: Any
one can create account and access services from service platforms like AWS,
Google, Microsoft etc.
Advantages:
Ø Flexible
Ø Reliable
Ø High
Scalable
Ø Low
cost
Ø Place
independence
Disadvantages:
Ø Less
Secured
Ø Poor Customizable
·
Private Cloud: Also
Known as enterprise cloud which are only available to the enterprise and its
branches across the globe with the help of internet which is more secure than
Public Cloud.
Advantages:
Ø Highly
private and secured: Private cloud resource sharing is highly secured.
Ø Control
Oriented: Private clouds provide more control over its resources than public
cloud as it can be accessed within the organization’s boundary.
Disadvantages:
Ø Poor
scalability: Private type of clouds is scaled within internal limited hosted resources.
Ø Costly:
As it provides secured and more features, so it’s more expensive than a public
cloud.
Ø Pricing:
is inflexible, i.e., purchasing new hardware for up-gradation is more costly.
Ø Restriction: It can be accessed locally within an organization and is difficult to expose globally.
·
Hybrid Cloud:
Merging of both Public and Private clouds to reap both their respective
benefits.
Advantages:
Ø Flexible
Ø Secure
Ø Cost
Effective
Ø Rich
Scalable
Disadvantages:
Ø Complex
networking problem
Ø Organization’s
security Compliance
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