Table Of ContentVirtualization - The Complete Cornerstone
Guide to Virtualization Best Practices:
Concepts, Terms, and Techniques for Successfully
Planning, Implementing and Managing Enterprise
IT Virtualization Technology
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A Complete Guide on Virtualization
Table of Contents
1 Introduction 7
1.1 What is Virtualization? 7
1.2 The History of Virtualization 8
1.3 Goals and Objectives of Virtualization 10
2 Common Terminology 15
3 Companies Using Virtualization 23
3.1 Akorri 23
3.2 Blue Lane 24
3.3 CiRBA 25
3.4 Embotics 26
3.5 EqualLogic 26
3.6 Marathon Technologies 27
3.7 Plate Spin 27
3.8 Platform Computing 28
3.9 Vizioncore 28
3.10 VMware 29
4 Why Virtualized Technology? 31
5 Benefits of Virtualization 35
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A Complete Guide on Virtualization
6 Virtualization Technologies 39
6.1 Ubuntu (Server Edition) 39
6.2 Altiris 41
6.3 Windows Server 43
6.4 Software Virtualization 44
6.5 VMware 46
6.6 Intel Virtualization 49
6.7 Red Hat Virtualization 51
6.8 Softgrid Application 53
6.9 Linux Virtualization 56
6.10 Desktop Virtualization 60
6.11 Hardware Virtualization 62
6.12 Resource Virtualization 64
6.13 Processor Virtualization 66
6.14 Application Virtualization 68
6.15 Storage Virtualization 70
6.16 Virtualization Density 72
6.17 Para-Virtualization 73
6.18 OS Virtualization 75
6.19 Virtualization Software 78
6.20 Data Storage Virtualization 100
6.21 Intel Virtualization Technology 104
6.22 Thinstall Virtualization Suite 107
6.23 Net Framework Virtualization 112
6.24 Windows Virtualization on Fedora 115
6.25 Storage Virtualization Technologies 116
6.26 Virtualization Level 120
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A Complete Guide on Virtualization
6.27 Security Monitoring and Virtualization 122
6.28 Oracle Virtualization 130
7 Comparison between Technologies 131
8 Accomplishing Virtualization 135
8.1 Migrating from a Standard Technological
Environment to a Virtualized One 135
8.2 A Simple How-To Guide 143
8.3 Top 10 Things to Do and Consider when
Migrating from P2V 149
8.4 Top 10 Virtualization Pitfalls 166
8.5 Problems with Virtualization 176
9 Managing a Virtualized Environment 181
9.1 Support Issues 181
9.2 Measuring Capacity and Performance 187
9.3 Contracts and Agreements 191
9.4 Organizational Considerations 195
10 References 199
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A Complete Guide on Virtualization
6
A Complete Guide on Virtualization
1 Introduction
1.1 What is Virtualization?
Virtualization, in its broadest sense is the emulation of one
or more workstations/servers, within a single physical
computer. In other words, it is the emulation of hardware
within a software platform. This type of virtualization is
sometimes referred to as full virtualization and it allows one
physical computer to share its resources across a multitude
of environments. This means that a single computer can
essentially take the role of multiple computers.
Virtualization is not only limited to the simulation of entire
machines. In fact there are many different kinds of
virtualization. One of these is in use by almost all modern
machines today and is referred to as virtual memory.
Although the physical locations of data may be scattered
across a computers RAM and Hard Drive, the process of
virtual memory makes it appear that the data is stored
contiguously and in order. RAID (Redundant Array of
Independent Disks) is also a form of virtualization along
with disk partitioning, processor virtualization and many
more virtualization techniques.
Although virtualization technology has been around for
many years, it is only now starting to be fully deployed. One
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A Complete Guide on Virtualization
of the reasons for this is due to the increase in processing
power and advances in hardware technology. Virtualization
can benefit a wide range of users, from IT professionals, to
large businesses and government organizations. Its many
benefits are only now starting to be realised.
As mentioned before, virtualization lets you simulate
hardware via software. For this to occur, some type of
virtualization software is required on a physical machine.
The most well known virtualization software in use today is
VMware. VMware will simulate the hardware resources of
an x86 based computer, to create a fully working virtual
machine. An operating system and applications can then be
installed on this virtual machine, just as you would on a
physical machine. Multiple virtual machines can be installed
on a single physical machine, as separate entities. This
means they will not interfere with each other whatsoever.
1.2 The History of Virtualization
Virtualization technology has been around for longer than
most people realize. It is only now starting to be widely
used because of the massive increase in hardware
resources.
The concept of virtualization was first thought up in the
1960s. It was then implemented by IBM to help split up their
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A Complete Guide on Virtualization
massive mainframe machines into separate ‘virtual
machines’. The reason why this was done was to maximise
their available mainframe computers efficiency. Before
virtualization was introduced, a mainframe could only work
on one process at a time, this was a waste of resources.
Virtualization was introduced to solve this problem. It
worked by splitting up a mainframe machines hardware
resources into separate entities. Due to this fact, a single
physical mainframe machine could now run multiple
applications and processes at the same time.
As x86 became the dominant instruction set architecture in
computer technology during the 1980s, and the client-
server model was established to allow for distributed
computing, the need for virtualization was no longer really
required. This is because the client-server model allowed
administrators to connect together many low cost
workstations. Resources could then be distributed among
these workstations using a few powerful servers. The
massive use of Windows and Linux based operating
systems during the 1990s further solidified the x86
architecture and client-server model, as the dominant
model in computer technology.
However no one could have imagined the massive growth
in the use of computer technology and this created new IT
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