Cloud Computing Architecture

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What is the architectural model of cloud computing?
Basically there are two model in the cloud computing.
 Administrative model
 Instance Model




What is the Administrative tier on architectural model of cloud computing?
The administrative tier provides the functionalities responsible for rapid account management, while the instance tier hosts the applications that tenants execute according to subscription contracts defined at the administrative level.




What is the Instance tier on architectural model of cloud computing?
In the instance tier, business logic will interact with the multi-tenant database through query processor and display the data through the presentation or Service oriented layer to the browser.


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