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The Virtual Machine

The Virtual Machine. Dongpu Jin JGEN 200 Project 5 Instructor: Dr. Mary Schieke April/26/2011. Overview. Background Explanation History Benefits Demo Summary Reference Question. Background. Definition:

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The Virtual Machine

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  1. The Virtual Machine Dongpu Jin JGEN 200 Project 5 Instructor: Dr. Mary Schieke April/26/2011

  2. Overview • Background • Explanation • History • Benefits • Demo • Summary • Reference • Question

  3. Background • Definition: • “ A virtual machine is a software implementation of a computer that executes programs like a physical machine. “ –Wiki • Confusing?

  4. Background • Virtual machine is a software. • But it acts like a physical computer. • Computer within a computer.

  5. Explanation Virtual Machine technology consists of two parts: • Virtual Machine Monitor • Individual Virtual Machine

  6. Explanation • Virtual Machine Monitor manages each individual Virtual Machine • Egg-Carton relationship

  7. Explanation • Before Virtualization: • Single OS per computer • After Virtualization: • Multiple OS per computer

  8. History • First invented 50 years ago by IBM • Hardware are precious and expensive • Multiple users share the hardware through virtual machine • Disappeared between 1980s and 1990s • Drop in hardware cost

  9. History • Revival in 2005 • Hardware often underutilized • OS becomes complex and easy to crash • Threat from Internet • Intel, AMD, Sun Microsystems, IBM, and VMware joined this growing market.

  10. Benefits • Improve Utilization • From 5-15% to 60-80%

  11. Benefits • Minimize Downtime • If one virtual machine crashes, simply copy to another one

  12. Benefits • Enforce Security • One virtual machine is under attack • Will not effect other virtual machines

  13. Demo • I will be running four OS at the same time: • Windows 7 • Ubuntu • GNOME • KDE

  14. Summery • We covered: • How virtual machine works • The history of virtual machine • Some benefits we can gain from virtual machine technology

  15. Reference • Hennessy, J. L. Computer Architecture. • vmware. Virtualization Overview. • http://www.scribd.com/doc/51789353/3/A-Brief-History-of-Virtual-Machines • http://www.google.com/imghp?hl=en&tab=ii&q=virtual%20pc%20icon • http://itknowledgeexchange.techtarget.com/server-virtualization/an-eggceptional-virtualization-analogy/

  16. Question?

  17. Thanks! • This concludes my presentation The Virtual Machine • Appreciate all your attention

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