HP Matrix Operating Environment Software - Manual (Page 144)

This time, vse02 looks like the best VM host candidate in this scenario, as long as additional CPU
are added to it to handle the additional processing load.
Adding processor cores
A look at the peak usage data shows that the usage of the CPU core allocation varies among the
five servers, but usage still appears to be within the bounds of a server having no more than eight
cores. However, Capacity Advisor will expect to calculate CPU processing overhead for running
each of the virtual machines. Eight cores may not be enough when CPU virtualization overhead
is accounted for, but for now add four cores to vse02 for a total of eight cores.
NOTE: You can refine this estimate further by changing utilization limits or by forecasting future
growth. Also, the longer the period of data analyzed, the better the analysis of resource utilization.
From the System tab, select the vse02 check box, and then What-If Action
→Edit System....
Change the number of CPU cores from four to eight and click OK.
Other attributes such as memory size, processor speed, and bandwidth can be adjusted at the
same time on the Edit System screen. Thus, you can tweak the resource allocations on this screen
as you refine the fit through additional changes.
Related topic
•
“Editing a system” (page 75)
Continuation: Making servers become VMs
Once again, select the five servers that are to become virtual machines and then select What-If
Action
→Change Servers to be VMs→Manually Change Servers to be VMs...
When the screen repaints, you first see the selected legacy servers listed. In the CPU Virtualization
Overhead column, you have the opportunity to designate the percentage of overhead that you
anticipate each virtual machine will require for operation. After referring to
“Adjusting for
virtualization changes” (page 191) , add a CPU virtualization overhead of 20% for each of the
legacy servers. You must click Refresh (which is down and to the right of the “Systems to be modified
table”) in order to update the “To: (Selected VM host)” table to include virtualization overhead in
the utilization calculations.
144 Planning with Capacity Advisor