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vReplicator v2.5 Chapter 2 Installation 6
A virtual infrastructure affords maximum flexibility, allowing you to treat VMs as if they
were physical hardware and software. VMs can be moved easily between hosts. They can
be run in isolation or in groups. Their workloads can be reconfigured as demand requires.
This flexibility is supported by management tools. VMware VirtualCenter (VC) and ESX
Server are, respectively, the management server and software components that lend order
to flexibility in a virtual environment.
As a management server, VC orchestrates the configuring and provisioning of all VMs.
VC’s database stores all of the shared information between the physical hosts and the
VMs. Without compromising security, VC makes it possible to connect to a host
remotely from a standard Windows computer.
As its own host OS, ESX Server allows you to establish VMs, configure and manage
their shared resources, and make ongoing adjustments to increase performance. Each VM
is configured with its own virtual hardware—for example, central processing unit (CPU),
random access memory (RAM), and universal serial bus (USB) ports. The work of the
VM’s physical counterpart is run in its native OS. Because VMs require neither
redundant hardware nor physical space, virtualization can mean significant cost savings.
The transition from physical to virtual is seamless. To achieve optimum utilization in a
virtualized environment, it must be maintained well. To do this, data and other assets
must be monitored, protected, and preserved.
Windows XP
Development
Test Machine
Windows
Server
Exchange
Server
Windows
Server
VPN
Linux
SQL Server
Multiple Physical Machines
VM
Windows XP
Development
Test Machine
VM
Windows
Server
Exchange
Server
VM
Windows
Server
VPN
VM
Linux
SQL Server
Sin
g
le ESX Server with Multi
p
le VMs
Machine 1
Hardware
Machine 2
Hardware
Machine 3
Hardware
Machine 4
Hardware
Pooled hardware shared by all VMs.
Windows XP
Development
Test Machine
Windows
Server
Exchange
Server
Windows
Server
VPN
Linux
SQL Server
Multiple Physical Machines
VM
Windows XP
Development
Test Machine
VM
Windows
Server
Exchange
Server
VM
Windows
Server
VPN
VM
Linux
SQL Server
Sin
g
le ESX Server with Multi
p
le VMs
Machine 1
Hardware
Machine 2
Hardware
Machine 3
Hardware
Machine 4
Hardware
Pooled hardware shared by all VMs.
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