6.0.1

Table Of Contents
Introduction to VMware vSphere
Virtual Machines 1
Before you start creating and managing virtual machines, you benefit from some background information,
for example, the virtual machine lifecycle, components, and VMware Tools.
This chapter includes the following topics:
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“What Is a Virtual Machine?,” on page 11
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“Virtual Machines and the Virtual Infrastructure,” on page 12
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“Virtual Machine Lifecycle,” on page 13
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“Virtual Machine Components,” on page 13
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“Virtual Machine Hardware Available to vSphere Virtual Machines,” on page 13
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“Virtual Machine Options and Resources,” on page 15
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“vSphere Web Client,” on page 16
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“Introduction to VMware Tools,” on page 17
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“Where to Go From Here,” on page 17
What Is a Virtual Machine?
A virtual machine is a software computer that, like a physical computer, runs an operating system and
applications. The virtual machine consists of a set of specification and configuration files and is backed by
the physical resources of a host. Every virtual machine has virtual devices that provide the same
functionality as physical hardware are more portable, more secure, and easier to manage.
A virtual machine consists of several files that are stored on a storage device. The key files are the
configuration file, virtual disk file, NVRAM setting file, and log file. You configure virtual machine settings
through the vSphere Web Client, one of the vSphere command-line interfaces (PowerCLI, vCLI) or the
vSphere Web Services SDK.
CAUTION Do not change, move, or delete virtual machine files without instructions from a VMware
Technical Support representative.
Table 11. Virtual Machine Files
File Usage Description
.vmx vmname.vmx
Virtual machine configuration file
.vmxf vmname.vmxf
Additional virtual machine configuration files
.vmdk vmname.vmdk
Virtual disk characteristics
-flat.vmdk vmname-flat.vmdk
Virtual machine data disk
VMware, Inc. 11