Page 175 - Cloud computing: From paradigm to operation

Framework and requirements for cloud computing 1

Table I.10 – A use case of cloud service control status validation

Post-conditions

(optional)
Derived – Initiation of validation (See clause 7.5)
requirements – Validation of result for request of cloud service control (See clause 7.5)
– History of cloud service control status validation (See clause 7.5)
– Status checking period for validation (See clause 7.5)
– Notification of result for request of cloud service control (See clause 7.5)

Table I.11 – A use case for cloud service migration in cloud service brokerage

Title A use case for cloud service migration in cloud service brokerage.
Description This use case describes cloud service migration in cloud service brokerage during the service
period.
The CSC is using a cloud service provided by the CSP(A) under a contract with a CSN: cloud
service broker.
The CSC determines to change the physical location of the service according to some usage
requirements. For instance, the CSC, who operates a business using the cloud service, may
determine to move business location to another country.
The CSC makes a request to migrate the cloud service to the CSN: cloud service broker.
The CSN: cloud service broker searches product catalogue to select a CSP candidate (CSP(B))
who provides an equivalent service with the existing service. The CSN: cloud service broker
and the CSC negotiate to determine the most appropriate service for the migration. After the
CSN: cloud service broker reaches an agreement, the CSN: cloud service broker notifies the
updated service information due to the service migration.
On behalf of the CSC, the CSN: cloud service broker requests to create a service to the CSP(B)
that can accommodate the service requirements.
The requested CSP(B) creates a service according to the service requirements.
The CSN: cloud service broker makes a request for service migration to the CSP(A) so that the
CSP(A) migrates data and the status of the existing service to the service created by the CSP(B).
After the CSN: cloud service broker confirms that the migration of status and data was
accomplished, the CSP(B) initiates the created service using the transferred data and status.
The CSP(B) informs on a creation of the service and provides information for accessing the
service such as service access point, ID and password to the CSN: cloud service broker.
Using the access information, the CSC accesses and utilizes the created service.
Finally, the CSN: cloud service broker requests termination of the existing service to the CSP(A)
and ends their contract.

Roles/sub-roles CSP, CSN: cloud service broker, CSC

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