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What Is Virtualization

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10/13/2015
UNIT 4 RESEARCH PAPER 1: WHAT IS VIRTUALIZATION?
I watched the YouTube video “Virtually Speaking: What is Virtualization?” by Vizioncore (dated 2010). Representative Larry Loucks provides a comparison between the traditional arrangement of server hardware, operating systems, driver programs, and applications to the new arrangement in virtualization. It includes the same elements with the addition of a virtualization layer mediating the server hardware and operating system(s), which has the drivers embedded to the virtual machines of that layer. The problems of the traditional arrangement – 1) allows only one operating system per server, 2) disaster recovery and migration limitations, 3) under-utilization of servers and 4) cost ineffectiveness due to multiple servers – are solved or improved in virtualization – 1) allows multiple operating systems per server, 2) portability improves backup, restoration, and migration, 3) consolidation allows maximum utility of servers, and 4) less servers require less maintenance, power usage, and space occupancy, leading to less cost.
Topics * Description of traditional architecture of past two decades * Problems of traditional architecture * Description of new architecture of Virtualization * Solutions and benefits of Virtualization
Terms * Driver – programs written to give operating systems ability to work with server hardware * Virtualization – the inclusion of virtual machines with embedded virtual drivers between operating systems and server hardware that allows multiple operating systems and their applications to run on single server hardware * Hypervisor – a virtualization layer shared by one or more servers allowing portability of backed up files and operating systems with apps run that on one server, now transferable to

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