VIRTUALIZATION TECHNOLOGIES

摘要

Virtualization is one of the hottest technologies in IT today, and the excitement is fueled in part by free server virtualization products from Microsoft and VMware. Virtualization started as software that let you run different OSs on the same computer simultaneously. Today's technologies extend virtualization to the application level and even to the hardware level, and mature products are available in each category. Even if you're not using virtualization technology currently, you're likely to do so in the future, and you'll want to understand the current virtualization picture— how all the pieces fit together, and the major products available in each category. For a list of the leading virtualization products, see the sidebar "Virtual Server Products," on page 26.