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The Greening of IT
100 How Companies Can Make a Difference for the Environment

VMWARE Cluster
Virtual Machines
G G G G G G G G G G G G
u u u u u u u u u u u u
e e e e e e e e e e e e
s s s s s s s s s s s s
t t t t t t t t t t t t
Host

Network
Data Stores

Virtual Center
Server

ptg

VI Client

Source: IBM design document
Figure 6.5 VMWare cluster concept
The following list gives the details of the VMWare/VMotion architecture
used for the data center:

■ VMware ESX Operating Systems
■ VMware Virtual SMP: VM to use up to four physical processors simul-
taneously.
■ VMware High Availability (HA): HA for any application running in a
virtual machine, regardless of its operating system or underlying hard-
ware configuration.
■ VMware DRS: Distributed Resource Scheduler monitors utilization
across resource pools and allocates available resources among the virtual
machines based on predefined rules.