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How many times have you felt that your application requires a higher system profile?
How many times have you have experienced trouble with change in software versions used by you and another person?
How many times have you felt to be stuck with data on a system back home?
Tom Mathews
S8 L
Roll No: 57
What is Cloud Computing ?
No matter if you browse through a PC, PDA or mobile phone ... the important thing is access from any system to the "cloud of information" through the Internet.
The information must be on servers, programs that currently operate and are installed on your computer, operating through the internet, are installed on servers and that implementation of the "Cloud Applications" is completely online and can access the application and information from any terminal with Internet access.
Self Healing
Linearly Scalable
Flexible
Multi-tenancy
Cost
Can quickly launch most applications (ex: Web 2.0 applications)
It makes it possible to scale up applications (tera, peta, and exa bytes of storage as well as MFlops of CPU power)
It can provide security, isolation and other non-functional capabilities also.
SaaS
Provider supplies the hardware infrastructure and the software product.
Azure Service, Google App.
PaaS
Set of software and product development tools.
Force.com, GoogleApp.
IaaS
Provides virtual server instances with unique IP addresses and blocks of storage on demand.
Customer uses provider’s application interfaces.
Amazon, IBM.
Public cloud
Private cloud
Hybrid cloud (virtual private cloud)
Provisioning manager (IBM’s Tivoli) allocates and de-allocates resources, reserves resources for future use; runs on (WebSphere) application server
Provisioning monitor (IBM’s Tivoli) monitors the health of the allocated resources
XEN hypervisor is used for creating virtual machines
Consolidate all the needs of an organization in a systematic and accountable fashion.
Procure computing related resources similar to how you rent a place for living.
Examples from amazon.com
Storage on demand (S3)
Computation service (EC2)
Cloud based simple workstation.
Sun Microsystem , IBM , Amazon , Google, Microsoft , Yahoo
Amazon Web Services
Cloudo, iCube, EyeOS
Terminals fools
Transparent updates
More Security
The order of licenses
Mobility and synchronicity
Scalability
Relegation of control on data
Lack of access to the source
Dependence of internet computing in the cloud
No standards for terms of services
http://en.wikipedia.org/wiki/Cloud_computing
http://www.sunmicrosystems.com
http://www.ibmsoftwarestrategygroup.com
http://searchcloudcomputing.techtarget.com
http://dbpedia.org/page/Cloud_computing
http://salesforce.com/cloudcomputing
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