Page 250 - Cloud computing: From paradigm to operation
P. 250

1                                    Framework and requirements for cloud computing


            I.2     General use case


                                       Table I.2 – General use case of distributed cloud

                                                         Use case

             Name                General use case of distributed cloud.
             Description         The use case describes the scenarios for the CSC to use a published cloud service.
                                 The cloud service has already been published by a CSP and can be browsed through the
                                 product catalogue provided by the CSP.
                                 The  CSC  subscribes  the  cloud  service  with  various  requirements,  for  example,  different
                                 requirements for service capacity and network latency.
                                 The distributed cloud realizes service provisioning to provide cloud service on appropriate
                                 core, regional, or edge cloud, according to the CSC's subscription.
             Figure





















             Pre-conditions
             (optional)

             Post-conditions     –  The used service should be kept available during the whole invocation.
             (optional)          –  The SLA should be met for CSC.

             Requirements        –  High scalability (See clause 7.1)
                                 –  High reliability (See clause 7.1)
                                 –  Low power consumption (See clause 7.1)
                                 –  Low latency (See clause 7.2)
                                 –  On-demand network traffic control (See clause 7.2)


























            242
   245   246   247   248   249   250   251   252   253   254   255