VMware VSPHERE CLIENT 4.0 - UPGRADE GUIDE UPDATE 1 Manuel d'utilisateur Page 15

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3BSE056141-510 F 15
Section 1 Introduction
As the use of virtualization has expanded dramatically in the business and financial
sector amongst others, ABB is now providing the ability to take advantage of
virtualization in the process industries. Virtualization can be used in 800xA systems
to combine multiple 800xA server nodes onto a single computer. The total number
of physical computers required in an installation is reduced significantly. This also
reduces the required space for computers, hardware acquisition cost for computers
and cabinets, and operating costs (such as energy costs).
Overview of Virtualization
VMware ESX is a virtualization technology that enables running multiple virtual
machines (VM) on the same physical computer. Each VM represents a computer
and its hardware components (CPU, RAM, disk drives, network adapters, etc.).
Each VM requires an operating system and applications to be installed in the same
manner as a physical computer. The VM appears to the operating system as a
physical computer.
Each VM requires a licensed copy of the Windows® operating system.
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