By David Marshall

ISBN-10: 0849339316

ISBN-13: 9780849339318

Executives of IT companies are forced to fast enforce server virtualization suggestions due to major fee mark downs. in spite of the fact that, such a lot IT execs tasked with deploying virtualization options have very little event with the know-how. This creates a excessive call for for info on virtualization and the way to correctly enforce it in a datacenter. complicated Server Virtualization: VMwareR and MicrosoftR systems within the digital information middle makes a speciality of the center wisdom had to evaluation, enforce, and hold an atmosphere that's utilizing server virtualization. This publication emphasizes the layout, implementation and administration of server virtualization from either a technical and a consultative viewpoint. It presents functional courses and examples, demonstrating how you can correctly dimension and assessment virtualization applied sciences. This quantity isn't really established upon idea, yet as a substitute on genuine global adventure within the implementation and administration of huge scale tasks and environments. at the moment, there are few specialists during this really new box, making this e-book a beneficial source The booklet is split into significant sections making it either a step by step consultant for studying and imposing server virtualization in addition to a short reference. The bankruptcy association focuses first on introducing ideas and history, after which offers real-world situations.

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The term virtual memory in this context should not be confused with virtual memory as in a paging or swap file as used by many operating systems to extend the amount of physical memory available by using hard disk storage as additional memory. The virtualization platform’s VMM manages the memory addresses allocated to a virtual machine. In some cases, some of the virtual machine’s memory will map to physical memory of the host server and some may actually map to either the host server’s paging or swap file memory or to the virtualization platform’s swap file, if supported.

Both companies have been acquired (VMware by EMC and Connectix by Microsoft) and their technology continues to lead to innovations in the computer industry. While virtualization solves many of the problems for IT, it is not a universal solution to all problems. There are times in which virtualization is not mature enough of a technology to be applied, such as with applications requiring high processor utilization or heavy multiprocessing capabilities (those consuming the resources of a four-way or greater server) or when the need for high end graphics display is needed (such as doing 3D design work in a CAD/CAM application like Unigraphics).

The reverse is also true. A host server that only supports SCSI hard disk drives may have IDE virtual hard disk drives depending on IDE support from virtualization platform. Virtualization platforms usually support at least one of the two hard disk drive interfaces and some support both IDE and SCSI virtual hard disk drives. Virtual hard disk drives exhibit certain characteristics and follow certain standards of the interface used just as in physical servers. In a virtual machine, there are obviously no physical interconnects, cables, or terminators, but the software interfaces are the same as in physical hard disk drives.

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Advanced Server Virtualization by David Marshall

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