Virtualization For Dummies
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Currently, most of the activity in the virtualization world focuses on server virtualization —– the data centers or server farms. The three main types of server virtualization are:

  • Operating system virtualization (aka containers): Creates self-contained representations of underlying operating system in order to provide applications in isolated execution environments. Each self-contained environment (container) reflects the underlying operating system version and patch level.

  • Hardware emulation: Represents a computer hardware environment in software so that multiple operating systems can be installed on a single computer.

  • Paravirtualization: A thin software layer that coordinates access from multiple operating systems to underlying hardware.

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Bernard Golden has been called “a renowned open source expert” (IT Business Edge) and “an open source guru” (SearchCRM.com) and is regularly featured in magazines like Computerworld, InformationWeek, and Inc. His blog “The Open Source” is one of the most popular features of CIO Magazine’s Web site. Bernard is a frequent speaker at industry conferences like LinuxWorld, the Open Source Business Conference, and the Red Hat Summit. He is the author of Succeeding with Open Source, (Addison-Wesley, 2005, published in four languages), which is used in over a dozen university open source programs throughout the world. Bernard is the CEO of Navica, a Silicon Valley IT management consulting firm.

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