
166 Essentials of Cloud Computing
the VMs. Normally, the virtualized storage will be called a logical storage.
Figure 7.5 illustrates the process of storage virtualization.
Storage virtualizationis mainly used for maintaining a backup or replica
of the data that are stored on the VMs. It can be further extended to sup-
port the high availability of the data. It can also be achieved through the
hypervisors. It efciently utilizes the underlying physical storage. The other
advanced storage virtualization techniques are storage area networks (SAN)
and network-attached storage (NAS).
7.2.4 Network Virtualization
Network virtualizationis a type of ...