Page 662 - Cloud computing: From paradigm to operation

3 XaaS

Use case

Figure

Pre-conditions – CSC accesses the IaaS through portal with appropriate security mechanism.
(optional) – CSC has created a VM (e.g., VM1).
– CSC needs more VMs identical or similar to VM1.
Post-conditions

(optional)
Description – CSC selects VM1 which it wants to clone.
– CSC selects clone operation, and changes some regular parameters, for example, VM
name, the number of CPUs and memory. In this case, CSC clones two VMs, i.e., VM11
and VM12.
– CSC starts the cloned VMs, and the cloned VMs are similar to the original one, with
slight difference in the changed parameters.
Requirements – VM clone (refer to clause 7.1.6)

I.3.3 VM backup use case
Use case

Name IaaS use case on VM backup
Abstract CSP recovers the VM according to the backup policies CSC configured.
Roles CSC, CSP
Figure

Pre-conditions – CSC accesses the IaaS through portal with appropriate security mechanism.
(optional) – CSC has created a VM which is in a normal running state and deployed CSC's
application on the VM.
– CSC needs backup functions to support its application.

Post-conditions

(optional)

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