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XaaS 3
Use case
Description – CSC configures the backup policy for the VM, and the policy could be weekly backup.
– CSP performs the backup operation according to the policy the CSC configured.
– CSP detects that the VM becomes faulty or its data is lost, CSP recovers the VM using
backup automatically without CSC's awareness.
Requirements – VM backup (refer to clause 7.1.7)
I.4 IaaS storage service use case
Use case
Name IaaS use case on storage
Abstract CSC uses block, file or object storage directly or attach to the virtual machine provided by
the CSP
Roles CSC, CSP
Figure CSC
CSP
Storage Computing
resource pool resource pool
Portal
Cloud infrastructure
Y.3513(14)_FI.4
Pre-conditions – CSC accesses the IaaS through the portal with appropriate security mechanism and
(optional) retrieves the functions exposed that are related to storage and attached computing, if
needed.
Post-conditions
(optional)
Description – CSC accesses and queries the CSP portal to retrieve the list of supported functions
related to storage functions.
– CSC selects the appropriate storage from the query results and requests the CSP to
create block, file or object storage based on the selection.
– CSP creates block, file or object storage from the storage resource pool based on the
information provided by the CSC.
– CSC attaches the created storage to specified virtual machine if needed.
– CSC manages and monitors the created storage during its lifecycle. It includes, but not
limited to:
• create, attach, detach, query and delete a volume of storage at either block level or
file-system level;
• write, read and delete data;
• query the storage information and its status;
• set migration or I/O limitation policies;
• execute performance metrics;
• snapshot or backup the storage;
• reservation storage resource.
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