Users Guide

Clustering with Virtual Machines | Clustering
OMNM 6.5.3 Installation Guide 145
Primary Site - Virtualized: Expandability
Virtualizing the infrastructure also allows for future workload increases. The following chart
demonstrates increasing both application server processor core assignments from eight to twelve
and increasing the web server processor core assignments from four to eight.
Even with the expanded workload assignments, the infrastructure can still accommodate one
machine being offline while still remaining at full operational capacity.
Primary Site - Virtualized: Alternate Configuration
You can host the original virtualized configuration on two hosts though this omits the fully
redundant failover capabilities. Several other possible configurations are also possible with specific
trade-offs. Without further extensive discussions around operational needs and expectations, the
fully redundant configuration above is a recommended scenario.
Hardware
The following sections describe hardware recommended for the above example.
Storage
Virtualized environments require shared storage. This example assumes an external storage array
that serves this environment. The internal disks on these servers could be used as shared storage
with a Virtual Storage Appliance (VSA).
• Dell EqualLogic PS6110 Series Array (requirements would determine model)
While shared storage may be necessary for the example’s infrastructure to work, OpenManage
Network Manager’s heavy reliance on its database might allow for less robust or alternative storage
solutions—for example, internal storage with a Virtual Storage Appliance (VSA). This might
translate into hardware saving.
NOTE:
The specific hardware models mentioned here are subject to change without notice.
VM-to-Host Processor/Core(s) - 3 Hosts - Expanded Resources Scenario
LB
1
LB2 WS1 WS2 AS1 AS2 AS3 MS1 MS2 M3 MS4 MS5 MS6 Total
HS128122226
HS2 12 2 2 16
HS3 2 8 12 2 2 26
VM-to-Host Processor/Core(s) - 3 Hosts - Expanded Resources Scenario
LB
1
LB2 WS1 WS2 AS1 AS2 AS3 MS1 MS2 M3 MS4 MS5 MS6 Total
HS1 2 8 12
12 2 2 240
HS2
2 812 22228
HS3 0