Download - Introduction to Cloud Computing
What is the cloud?
• IT as a service
• Cloud allows access to services without user technical knowledge or control of supporting infrastructure
• Best described in terms of what happened to mechanical power over 100 yrs ago
• Now computers are simple devices connected to the larger cloud
• Data processing, storage and software applications that used to run locally are now being supplied by big central computing stations. They're becoming, in essence, computing utilities.
What isCloud Computing?
IaaSInfrastructure as a Service
PaaSPlatform as a Service
STaaSStorage as a Service
SaaSSoftware as a Service
Software delivery model
• Also known as On-demand service.
• No hardware or software to manage.
• Service delivered through a browser.
SaaS
Examples• CRM• Financial Planning• Human Resources• Yahoo mail
Commercial Services:• Salesforce.com• emailcloud
SaaS
Platform delivery model
• Category of cloud computing service that provides a platform and a solution stack as a service.
• Estimating demand is not a science!
• Platform management is not fun!
PaaS
Computer infrastructure delivery model
Access to infrastructure stack:– Full OS access– Firewalls– Routers– Load balancing
IaaS
MODES OF CLOUDS
1. Public Cloud: Can be accessed by any subscriber
with an internet connection and access to the cloud space.
Can be shared by various organizations.
E.g. : Amazon, Google, etc….
2. Private cloud: Is established for a specific group or an
organizations and limits access to just that group.
It is not shared with other organizations.
It is more expensive and more secure. E.g.: HP data centre, IBM, 3tera.
3. Hybrid Cloud: It is essentially a combination or usage
of both public and private cloud. Organizations may host critical
applications on private clouds. Where as relatively less security
concerns on public cloud.
CLOUD OPERATING SYSTEM
• Eye OS• Amoeba OS• Glide OS• Start force• my Goya• Corneli OS• Cloudo, Ghost, Zimdesk
Advantages:• Is Eco-Friendly.• Can reduce E-waste.• Helps to accelerate Green IT.• Can reduce Global Warming.• Reduce cost and Increase
storage.• Allows focus on any topic.
IaaS
PaaS
SaaS
DISADVANTAGE:• Requires a constant internet connection.• Security and Privacy.• A dead internet connection means no
work and in areas where internet connections are few or inherently unreliable, this cloud be a deal-breaker.
• When you are offline, cloud computing simply does not work.
CONCLUSION
• It is a powerful new abstraction for large scale data processing system.
• Also it is a new emerging architecture needed to expand the internet to become the computing platform of the future.