Page 187 - Cloud computing: From paradigm to operation

Framework and requirements for cloud computing 1

For the physical machine, [ITU-T Y.3510] defines three requirements as follows.

– It is recommended to support hardware resource virtualization.
– It is recommended to support horizontal scalability (e.g., adding more computing machines) and
vertical scalability (e.g., adding more resources with a computing machine).

– It is recommended to use power optimization solutions to reduce energy consumption.
It is inferred from the requirements that the physical machine supports scalable resources with consideration
of energy consumption.
Figure 6-1 shows the conceptual diagram of a computing machine in [ITU-T Y.3510].

Figure 6-1 – Concept of a computing machine in [ITU-T Y.3510]

A virtual machine provides virtualized resource pools using virtualization technologies specific to physical
resource types like CPU, memory, I/O and network from a physical machine. The virtual machine also covers
management issues.
Since all cloud services have to reside and operate on physical machines, it is important for the cloud service
providers and especially for the infrastructure as a service (IaaS) cloud service provider (CSP) who will build
the cloud infrastructure, as well as for the manufacturer who will sell the cloud infrastructure, to identify
specific requirements of the physical machine.

6.2 Introduction to the physical machine

The physical machine is a type of computing machine in which the cloud services must reside and operate
and that provides physical resources, such as processing, storage, networking, etc.

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