Chapter Excerpt

On-demand computing

Virtualization technology easily facilitates on-demand computing systems that can quickly allocate one or more servers to a group of users for a short time and reclaim and reuse those resources once the users' time has expired or if they have released the resources. This type of system is commonly used to provide virtual labs used by system administrators and developers for testing software configurations. It is also used to provide virtual training labs within a learning management system, whether it is a physical class or an e-learning system accessed over the Internet.

Once again, the ease of provisioning virtual machines supports on-demand systems very well, but it is the virtual machine's ability to discard changes made to their virtual hard disk drives, resetting them to a pristine state, where the most value is gained. Building these types of systems without using virtualization is very difficult and expensive.

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Business cases for server virtualization in its entirety.


Advanced Server Virtualization
  Home: Business cases for server virtualization: Introduction
  1: Server Consolidation
  2: Legacy server and application support
  3: Disaster recovery
  4: High availability
  5: Adaptive computing
  6: On-demand computing
  7: Limitations of server virtualization
ABOUT THE BOOK:   
Advanced Server Virtualization focuses on the core knowledge needed to evaluate, implement and maintain an environment that is using server virtualization. It emphasizes the design, implementation and management of server virtualization from both a technical and a consultative point of view. It provides practical guides and examples, demonstrating how to properly size and evaluate virtualization technologies. This volume is not based upon theory, but instead on real-world experience in the implementation and management of large-scale projects and environments. Currently, there are few experts in this relatively new field, making this book a valuable resource. Purchase the book from Amazon
ABOUT THE AUTHORS:   
David Marshall is currently employed as a software engineer for Surgient Inc., a software company based in Austin, Texas, that provides software solutions that leverage x86 server virtualization technologies. He holds a B.S. in finance and an Information Technology Certification from the University of New Orleans. He has been working with virtualization software for the past six years. Dave McCrory works as chief scientist for Surgient Inc. He has filed several patents around server virtualization and management of virtual machines and has worked with virtualization technology for more than five years. Wade A. Reynolds is employed as a senior consultant by Surgient Inc. He has been designing and implementing enterprise solutions based on virtualization technology on a daily basis for more than three years, including VMware ESX Server and Mircosoft Virtual Server from its pre-beta release.


This was first published in January 2008

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