HP Matrix Operating Environment Software - Manual (Page 119)

A Calculation assistance
See “Related technical papers” (page 118) 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 1-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 9 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:
•
A move from one system architecture to another system architecture can increase or decrease
resource utilization.
• A move from a two-way to a one-way system can decrease resource utilization.
• A change in the application can increase or decrease resource utilization.
(For information on how utilization is calculated for each resource, see Appendix C (page 149) .)
Cost calculation 119