HP Capacity Advisor 7.2 User Guide

6. Examine the table titled Systems to be modified:.
If you want to modify the CPU utilization to account for any change in virtualization overhead,
you can enter a percentage under CPU virtualization overhead %. The default is 0% to represent
no change. On entering a new value for CPU virtualization overhead, you must click Refresh
to update the table titled To: (Selected VM Host) with the new values.
7. Optional. Change the headroom calculation. You must click Refresh to update the server
destination table with the new values.
8. Within the table titled To: (Selected VM Host), select a destination VM host for the previously
selected systems.
Server presentation:
The table entries are ordered by headroom fitness as determined by Capacity Advisor, and
Capacity Advisor selects the top selection by default. Examine the headroom rating and the
utilization meters for each prospective host to determine which host best fits your goals for
headroom fitness and optimal utilization. (See “Headroom” (page 25) for a discussion of this
concept.)
9. Click OK to accept these changes.
Unknowingly accepting unseen values:
This can happen if you modify the CPU virtualization overhead % or headroom calculation
after selecting the destination server, but then click OK without refreshing the destination table
with the new values. The resulting change to the utilization values shown in the System tab
view will differ from those seen in the previously shown destination table because the System
tab will reflect the modified values.
When modifying CPU virtualization overhead % or headroom, remember to click Refresh,
and check the updated values shown in the utilization meters in the destination table. Once
you have refreshed this table, select a server based on the new values. If you want the same
server that you selected before changing the values, you must re-select that server to enable
the OK button.
After clicking OK, you see an updated Edit Scenario page. The modified system(s) now appear
with the VM guest type listed under System Type (for example, 'Integrity VM'). Additionally, the
modified system(s) is/are listed under the selected destination server.
To return to a planning checklist:
• Consolidating server loads onto a virtual machine manually (page 132)
Assigning VM hosts to a VMware DRS cluster in a scenario
You can use Capacity Advisor to simulate the behavior of workloads and VMs that are members
of a VMware Distributed Resource Scheduler (DRS) cluster. This conversion is meant to let you
simulate VM hosts running VMware ESX servers. Once you have created one of these “what-if”
cluster scenarios, you are able to do any of the following actions in this scenario:
• Add other VM hosts to the cluster
• Consolidate or load balance VMs in a cluster
In addition, you can run reports on clusters defined within a scenario.
76 Procedures