HP Matrix Operating Environment Software - Manual (Page 187)

Calculation assistance
See “Related technical papers” (page 185) for additional information.
Cost calculation
When creating utilization reports, Capacity Advisor gives you the ability to provide a value for
calculating the cost per kilowatt-hour for selected servers in relation to the resource usage on those
servers.
Cost per kilowatt-hour
Meaning
This field represents the effective cost per kilowatt-hour that is paid for powering a server in a data
center. It is a single value that assumes all servers under consideration are in the same data center
and subject to the same charge.
Default value
None
Where you might use this multiplier
•
To create a power utilization report
•
To create a scenario comparison report
Example
Assuming a server uses up to 20 kilowatts of power in a one-hour period, and the cost charged
to the data center per kilowatt-hour is 0.03, the cost of powering this one server for one hour would
be 0.6. (You select the currency type relevant to the data center location.
Cooling calculation
The following section describes the multiplier that you can use to more accurately report in cooling
costs within your data center.
Cooling multiplier
Meaning
The ratio of the energy consumed by the air conditioning system to remove heat from the machine
room to the energy consumed by the computers in that room.
This ratio varies depending on the climate and the type of air conditioner used. It is generally a
value between 0.3 and 1.6.
Default Value
.6
Where you might use this multiplier
•
to create a power utilization report
Example
A value entered of 0.9 would mean that for every 10 kilowatt-hours of energy used by the computers,
another nine kilowatt-hours of energy are needed to cool the machine room.
Adjusting for platform changes
Capacity Advisor gives you the ability to provide a compensating factor, a scaling multiplier, to
help Capacity Advisor to adjust memory when analyzing various scenario changes.
The following are situations that you will want to adjust for when modifying a scenario because
they can change resource utilization:
Cost calculation 187