Hot and cold cloning – VMware VCENTER CONVERTER EN-000158-02 User Manual

Page 11

Advertising
background image

Converter Standalone creates a VMware virtual machine based on a source physical machine. The migration

process is nondestructive, so that you can continue to use the original source machine. To run a converted

VMware virtual machine on the same network as the source physical machine, you must modify the network

name and IP address on one of the machines. This modification avoids network related conflicts and allows

the physical and virtual machines to coexist.

N

OTE

You cannot move original equipment manufacturer (OEM) media between physical machines. The

license is attached to the server when you purchase it from the OEM and you cannot reassign it. You can only

reassign retail and volume licenses to new physical servers. If you migrate an OEM Windows image, you must

have a Windows Server Enterprise or Datacenter Edition license on the ESX host to run multiple virtual

machines.

Hot and Cold Cloning

Although Converter Standalone 4.0.1 supports only hot cloning, you can still perform cold cloning using the

VMware Converter 3.0.3 Boot CD. Hot and cold cloning have different applications that depend on your virtual

environment.
Hot cloning, also called live cloning or online cloning, entails cloning the source machine while it is running

its operating system. Hot cloning allows cloning machines without shutting them down.
When you create a hot clone, the resulting virtual machine is not an exact copy of the source machine because

processes continue to run on the source machine during conversion.
To reduce the difference between the source and the resulting virtual machine, Converter Standalone can shut

down unused Windows services based on your settings on the View/Edit options page. You can set Converter

Standalone to synchronize the destination virtual machine with the source machine after hot cloning. You do

this by transferring from the source to the destination the blocks that were changed during the initial cloning

period.
Converter Standalone can shut down the source machine and power on the destination machine when the

conversion process is complete. This action is the P2V motion that allows migrating a physical machine source

to a virtual machine destination. The destination machine takes over the source machine operations with the

least possible down time.
Cold cloning, also called offline cloning, entails cloning the source machine when it is not running its operating

system. In cold cloning, the user restarts the source machine from a CD that contains an operating system and

the VMware Converter application. This cloning method allows you to create the most consistent copy of the

source machine because nothing changes on the source machine during conversion. Cold cloning leaves no

data on the source machine, but requires physical access to the source machine that is being cloned.
When you cold clone a Linux source, the resulting virtual machine is an exact replica of the source machine

and you cannot reconfigure the virtual machine. You must reconfigure the resulting virtual machine after the

cloning is complete.

Table 1-2

compares the hot and cold cloning modes.

Table 1-2. Hot and Cold Cloning Comparison

Comparison Criteria

Hot Cloning with Converter
Standalone 4.0.1

Cold Cloning with Converter
Enterprise 3.0.x

Licensing

No license required with VMware

vCenter Converter Standalone 4.0.1.

License file required for Enterprise

features of VMware Converter

Enterprise.

Required installation

Full Converter Standalone installation

or a server and agent installation.

No installation. Installation occurs

when you reboot the source machine.

Supported sources

Local and remote powered-on

physical or virtual machines.

Local powered-off physical machines.

Chapter 1 Introduction

VMware, Inc.

11

Advertising