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Week 20

Week 20. Virtualization. This week. Virtualization What is it? Software on different operating systems? Group Presentations – 10-15 minutes per group. What is it?.

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Week 20

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  1. Week 20 Virtualization

  2. This week • Virtualization • What is it? • Software on different operating systems? • Group Presentations – 10-15 minutes per group

  3. What is it? • “...a technique for hiding the physical characteristics of computing resources from the way in which other systems, applications, or end users interact with those resources. This includes making a single physical resource (such as a server, an operating system, an application, or storage device) appear to function as multiple logical resources; or it can include making multiple physical resources (such as storage devices or servers) appear as a single logical resource." taken from:Mann and Andi (N/A

  4. VMWare • VMware allows multiple operating systems can run unmodified and at the same time on a standard PC. • For developers: • run multiple development environments on your desktop without rebooting • isolate and protect operating environments, applications and data • interoperate among operating systems • For users, VMware makes it possible to run Windows applications with Linux.

  5. Taken from Nieh and Leonard (2000)

  6. It makes a standard PC hardware within a VM appear to run multiple unmodified PC operating systems simultaneously on the same machine. • Done by running each operating system in its own VM. • Still need a native OS to the machine – host OS. • An OS running as effectively as an application on top of VMware is called a "guest OS."

  7. Virtual PC • Microsoft’s Virtual PC download from: http://www.microsoft.com/windows/downloads/virtualpc/default.mspx • Free • Works in a similar way to VMWare

  8. Issues • http://www.bcs.org/server.php?show=ConWebDoc.9428 • http://www.bcs.org/server.php?show=ConWebDoc.18204 • http://www.bcs.org/server.php?show=ConWebDoc.20446

  9. Storage virtualisation • An unlimited number of storage resources over shared physical storage infrastructure, i.e. SAN (Storage Area Network).

  10. Desktop Virtualisation • desktop operating systems are installed onto emulated hardware. • Or, Users accessing a remote desktop on a multi-user operating systems. 

  11. Network Virtualisation • Example, Cisco Systems VLAN technology allowing logical segmentation of network.

  12. References • Mann and Andi (N/A), Virtualization 101, Enterprise Management Associates (EMA), <http://www.emausa.com/ema_lead.php?ls=virtwpws0806&bs=virtwp0806>. Cited by Wikipedia. • Nieh J and Leonard OC (2000) “Examining Vmware” DrDobbs Journal http://www.ncl.cs.columbia.edu/publications/drdobbs2000.pdf • http://www.bcs.org/server.php?show=ConWebDoc.9428 • http://www.bcs.org/server.php?show=ConWebDoc.18204 • http://www.bcs.org/server.php?show=ConWebDoc.20446

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