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6: A Most-Significant Step—“Virtualizing” Your IT Systems 101

■ VMware VMotion: The entire state of a virtual machine is encapsulated
by a set of files stored on shared storage, and VMware’s VMFS cluster file
system allows both the source and the target VMware ESX server to
access these virtual machine files concurrently.
■ VMware VMFS: VMFS is a cluster file system that leverages shared stor-
age to allow multiple instances of VMware ESX to read and write to the
same storage.
■ VMware Consolidated Backup: LAN free backup.
■ VMware Update Manager: Automation of patches and updates.
■ VMware Storage VMotion: Enable live migration of virtual machine
disk files across storage arrays with VMware Storage VMotion.

VMWARE Cluster HAM-DC2
VMware DRS: Enabled VLAN10
VMware HA: Enabled VLAN210
Total CPUS Resources: 96 GHz VLAN12
Total Memory: 128GB VLAN11
Number of Host: 4 EXT_VLAN128
Total Processors: 32 VLAN34
Number of Virtual Machines: 74 VLAN60
VLAN193 ptg
DC2-LUN1 VLAN120
SNXHAMVM25 DC2-LUN2 VLA31
VMWARE ESX Server 3.02 DC2-LUN3 VLAN32
X3850 DC2-LUN4 VLAN112
Eight 3.0 GHz Processors VLAN20
VLAN33
Six NICS SNXHAMVM26 VLAN192
32 GB RAM VMWARE ESX Server 3.02 VLAN160
15 Virtual Machines
X3850
Eight 3.0 GHz Processors
Six NICS SNXHAMVM27 SNXHAMVM28
32 GB RAM
11 Virtual Machines VMWARE ESX Server 3.02 VMWARE ESX Server 3.02
X3850 X3850
Eight 3.0 GHz Processors Eight 3.0 GHz Processors
Six NICS Six NICS
32 GB RAM 32 GB RAM
28 Virtual Machines 20 Virtual Machines
Source: IBM design document
Figure 6.6 VMWare cluster example with four nodes
Blade Servers and Virtualization

Two of the more recent trends in data center optimization are the adop-
tion of blade servers and the deployment of server virtualization. Each of
these can bring benefits to business. What’s more, combining blade servers
with a virtualization strategy can lead to even greater efficiencies for enter-
prise data centers. This section compares and contrasts the two technologies
that are both used for data center simplification and energy savings.