Page 44 - Cloud computing: From paradigm to operation

1 Framework and requirements for cloud computing

Use case

Pre-conditions – A CSP offers the configuration menu of the virtual desktop to CSCs.
(optional) – A CSC specifies parameter-settings shown in the configuration menu.
Post-conditions – A CSC uses DaaS service.
(optional)
Requirements – QoE
– Fast boot-up time
– Configurability of the virtual environment
– Single sign-on access control
– Support for high-definition (HD) and three dimensional (3D) applications
– Extensible storage
– Response time
– High availability
– Resiliency to disaster
– Service continuity
– System scalability
– DaaS developer environments
– Diversity of DaaS client

I.5 PaaS general use case

Use case
Name PaaS general use case

Abstract A PaaS CSP provides application hosting, capabilities offering, integrated development
environment and development tools to CSC.
Roles CSC, CSP

Figure

Pre-conditions – CSC requests PaaS service from CSP1 to develop an application.
(optional) – CSP1 provides a cloud-based integrated development environment to CSC as well as
some development tools.
– CSC requests PaaS service from CSP2 to use a service delivery platform provided by CSP.
– CSP2 provides service presence, orchestration, billing, mash-up and associated
development and testing tools.
– CSC requests PaaS service from CSP3 to an application hosting environment provided by
CSP.
– CSP3 provides application hosting service to CSC to deploy and execute the application.

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