Page 311 - Cloud computing: From paradigm to operation
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Framework and requirements for cloud computing                              1




                             Table I.4 – Inter-cloud use case: Guaranteed availability in the event
                                             of a disaster or large-scale failure

                                                         Use case

              High-level figure describing the
              use case























              Derived requirements for cloud   The system is required to support:
              capability                  –  Policy negotiation including SLA management among the multiple CSPs
                                             within a pre-established group;
                                          –  Self-activity monitoring at a CSP or mutual activity monitoring among the
                                             CSPs in a pre-established group. If the activity disappears, the detecting CSP
                                             should initiate the pre-configured actions;
                                          –  Discovery, reservation, use and release of cloud resources in a dynamic
                                             manner (i.e., not relying on the pre-configuration) on other CSPs within the
                                             federation;
                                          –  Application invocation over the reserved resources on other CSPs within the
                                             federation;
                                          –  Alteration and reversion (i.e., switchover and switchback), in a dynamic
                                             manner (i.e., not relying on the pre-configuration), of CSC access to any CSP
                                             within the federation;
                                          –  Exchange of monitoring and auditing information among the multiple CSPs
                                             within the federation;
                                          –  Exchange of authentication information about CSC (user/enterprise)
                                             authentication status among the multiple CSPs within the federation.

            I.5     Service continuity (in the case of service termination of the original CSP)
            Table I.5 shows an inter-cloud use case for service continuity in the case of service termination of the original
            CSP.



















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