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Introduction To Virtualization

Introduction To Virtualization - CNT 4603 System...

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CNT 4603: Introduction To Virtualization Page 1 Dr. Mark Llewellyn © CNT 4603: System Administration Spring 2012 Introduction To Virtualization CNT 4603: System Administration Spring 2012 Introduction To Virtualization Department of Electrical Engineering and Computer Science Computer Science Division University of Central Florida Instructor : Dr. Mark Llewellyn [email protected] HEC 236, 4078-823-2790 http://www.cs.ucf.edu/courses/cnt4603/spr2012
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CNT 4603: Introduction To Virtualization Page 2 Dr. Mark Llewellyn © Introduction To Virtualization In a general sense, virtualization , is the creation of a virtual, rather than an actual, version of something. For example, you can take a virtual tour of the White House by going to http://www.visitingdc.com/white-house/virtual-tour-white-house In other words, you can take a tour of the White House without actually going to the White House and taking the tour. From a computing perspective, you might have already done some virtualization if you’ve ever partitioned a hard disk drive into more than one “virtual” drive.
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CNT 4603: Introduction To Virtualization Page 3 Dr. Mark Llewellyn © Introduction To Virtualization More generally, in a computing environment, virtualization will create a virtual version of a device or resource, such as a server, storage device, network or even an operating system where the framework divides the resource into one or more execution environments. Virtualization is part of an overall trend in enterprise IT that includes autonomic computing , which is a scenario in which the IT environment will be able to manage itself based on perceived activity, and utility computing , in which the processor’s power is seen as a utility that clients can pay for only as needed.
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CNT 4603: Introduction To Virtualization Page 4 Dr. Mark Llewellyn © Introduction To Virtualization Despite all the recent buzz about virtualization being a new technology…it isn’t. Mainframe computers have offered the ability to host multiple operating systems for more than 40 years. However, four trends have converged in recent years that have allowed virtualization to migrate from the exclusive domain of mainframe computers to a front-and-center position in today’s computing environment. These four trends are: Hardware is under utilized Data centers are running out of space Energy costs are skyrocketing System administration cost are increasing
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CNT 4603: Introduction To Virtualization Page 5 Dr. Mark Llewellyn © Introduction To Virtualization Hardware is under utilized Moore’s Law demonstrates increasing returns – the amount of improvement in processor speed grows over time because there is an exponential increase in capacity for every generation of processor improvement.
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