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Zack Anderson Senior Network Administrator AIM IT Services

Xen is a free virtual machine monitor for IA-32, x86-64, IA-64 and PowerPC architectures. It is software that runs on a host operating system and allows one to run several guest operating systems on top of the host on the same computer hardware at the same time. Zack Anderson

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Zack Anderson Senior Network Administrator AIM IT Services

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  1. Xen is a free virtual machine monitor for IA-32, x86-64, IA-64 and PowerPC architectures. It is software that runs on a host operating system and allows one to run several guest operating systems on top of the host on the same computer hardware at the same time. Zack Anderson Senior Network Administrator AIM IT Services

  2. History • Xen originated as a research project at the University of Cambridge, led by Ian Pratt, senior lecturer at Cambridge and founder of XenSource, Inc. • XenSource, Inc. now supports the development of the open source project and also sells enterprise versions of the software. The first public release of Xen was made available in 2003.

  3. Intel/AMD • Key Instructions • IVT (Intel Virtualization Technology) • AMD-V (AMD Virtualization) • How they work? • Old sytle Rings (0/1) • New Stype Rings (0,1,2,3) • Intercept instructions and let Ring-0 handle them

  4. Domains • Domain-0 • Controls the real hardware • Modified Linux OS • Domain-U • Presented virtual hardware (all the same hardware) • With VT/AMD-V you can run any unmotified OS • Without VT/AMD-V you can run a motified OS only

  5. Desktop Future • Desktop Applications • Testing OS • Run a Custom OS in a virutal envoirment • Simple and quick restart of OS • Multiple Applications on one Workstation • Run Windows programs in Linux • Run Windows 98 programs on a protected Windows 2003 Server • Virus/Malware testing • Complete isolation of Main OS from Virus

  6. Server Future • Server Applications • Main hardware failure • Re-install on Windows OS • Simplifed backups • Complete utilization of hardware • CPU usage 100% • Computer maintance • Move VM machines to another physical server for hardware upgrades/outages

  7. Data Center Future • Data Center • Less Computers • One computer can run multiple Services • Less power usage • Rising cost of power, so less hardware is better • Sell people space on the same computer • Multiple people can have a full VM server but share physical space with other clients

  8. References • http://www.intel.com/technology/itj/2006/v10i3/3-xen/1-abstract.htm • http://en.wikipedia.org/wiki/Xen • http://en.wikipedia.org/wiki/Hypervisor • http://www.xensource.com/

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