Page 654 - Cloud computing: From paradigm to operation

3 XaaS

7.1.1 Physical machine

– It is recommended that IaaS CSP provides specific hardware specifications of physical machine to
the CSC according to SLA.
NOTE – SLA includes, but not limited to, central processing unit (CPU) type, CPU speed, number of CPU cores,
memory size, disk size and network interface card (NIC) number.
– It is recommended that IaaS CSP provides the CSC with operation handling mechanisms related to
physical machine such as start, shutdown, hibernate and wakeup.
– It is recommended that IaaS CSP provides physical machine related information in response to
queries from the CSC.

NOTE – The information includes, but not limited to, physical machine specifications, status and network
interfaces.

7.1.2 Virtual machine
– It is recommended that IaaS CSP provides virtual machine based on the VM template.
NOTE – By using the VM template, CSC can select the required number of CPU cores, memory size, disk size,
NIC within the resources available according to SLA.
– IaaS CSP can optionally provide virtual machine based on the configurations specified by the CSC.
– It is required that IaaS CSP provides the CSC with operations handling mechanisms related to VM,
including, but not limited to, create, delete, start, shutdown, suspend, restore, hibernate and
wakeup.
– It is recommended that IaaS CSP provides VM related information in response to queries from the
CSC.
NOTE – The VM related information includes, but not limited to, VM specifications, volume information, VM
status, IP address and network interfaces.
7.1.3 VM migration
– It is recommended that IaaS CSP provides virtual machine with migration functions. Based on
migration policies, the virtual machine can be migrated from one host to another.

7.1.4 VM scaling
– It is recommended that IaaS CSP provides virtual machine with scaling functions based on the scaling
policies and monitored events of the virtual machine.
NOTE – The types of VM scaling includes, but not limited to, configuration changes (e.g., CPU, memory,
bandwidth increased or bandwidth decreased) or components changes (new virtual machine added or
removed).
7.1.5 VM snapshot

– It is recommended that IaaS CSP provides virtual machine with snapshot functions. Schedule of
snapshots taken from the virtual machine can be performed automatically or manually.

7.1.6 VM clone
– It is recommended that IaaS CSP provides virtual machine with clone functions. The cloned VM has
identical configuration and CSP/CSC data as the original one.

7.1.7 VM backup
– It is recommended that IaaS CSP provides virtual machine with backup functions. When VM
becomes faulty or its data is lost, the VM can be restored using its backup stored according to the
CSC policy.

7.1.8 VM time synchronization
– It is recommended that IaaS CSP provides time synchronization functions, which allow the CSC to
control the VM time.

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