Atos Consulting Look Out | Physical and Logical Virtualization

Concept

Virtualization is a wide term that refers to the abstraction of IT resources. Nowadays, it is being applied to all environments of technology, from whole information systems to individual resources or capacities.
It is a key focus in modern data-centers as virtualization technologies allow physical characteristics to be minimized. Encapsulation of technical details and IT resources allow organizations to improve the efficiency and availability of their resources and applications.
Key elements of virtualizations are:
- Resource sharing—one physical resource (servers, operating systems, applications, communication networks or storage devices) can be defined as several virtual resources.
- Resources aggregation—several physical resources can be defined as one virtual resource.
- Emulation—virtual resources can deliver services that are not available in the underlying physical resources.
- Isolation—abstraction of physical resources allows an isolation level that is not possible to obtain sharing physical resources in a traditional way.
Virtualization (or physical consolidation) is the base of two further IT infrastructure optimization phases—logical consolidation and rationalization.
Physical consolidation enables a reduction in the horizontal growth; logical consolidation enables workloads to be shared between several virtual machines placed in different physical machines.
Rationalization allows for the identification of unnecessary or redundant applications that can be eliminated.
Virtualization, as a technology enabler, will provide scalability and agility to organizations and is being used massively by Cloud Computing service providers.

Trajectory

Virtualization can simply be a way to reduce and simplify the IT infrastructure and associated costs, or it can become a method to transform the global vision of the data-center.
Virtualization dramatically improves the efficiency and availability of resources and applications, and can also be used as ‘hot standby’ environment for physical production servers. This leads to an improvement and reduction in the costs of providing disaster recovery solutions.
Virtualization reduces hardware maintenance costs because of a lower number of physical devices. By implementing a server consolidation strategy, the space utilization and energy efficiency of the data-center can be increased. Beyond, there are personnel savings as fewer administrators are required for the fewer machines.

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