System Sizing Guidelines for Integrity Virtual Machines Deployment -- Hardware Consolidation with Integrity Virtual Machines

19
Configuring I/O Based on Resource Utilization
Once the utilization calculations are complete, do not forget about them when configuring virtual
I/O devices. For example, if you have sized the VM Host for two physical NICs to be shared by
six VMs, do not be careless when assigning those virtual NICs to virtual switches. Doing so creates
a performance bottleneck as in the example shown in Figure 2. That is, be careful to distribute the
virtual NICs to virtual switches according to their targeted utilization as illustrated in Figure 3.
The same concept applies to mass storage I/O as well. Be careful to configure the number of
logical storage devices (e.g., LUNs) according to the consolidation plan and then connect the
appropriate virtual disks to those logical storage devices when defining the virtual machines.
Figure 2 – Avoid creating performance bottlenecks by careless assignment of
virtual I/O to logical I/O devices.
Integrity VM Host
VM
vswitch Y
6%
vswitch X
74%
VM VM VM VM VM
36% 36% 2% 2% 2% 2%
Integrity VM Host
VMVMVM
vswitch Y
6%
vswitch X
74%
VMVMVM VMVMVM VMVMVM VMVMVM VMVMVM
36% 36% 2% 2% 2% 2%