Temperature/Power

The corresponding data granularity of a different time window size is different, and is explicitly shown in the figures. When the managed device is added, the real power reading may not be gotten from the managed device. At this time, Energy Manager uses its ‘Derated Power’ to report the IT equipment power. After the real power reading is gotten, Energy Manager will switch to the real power data as IT equipment power.

The ‘Power/Temperature’ tab also provides energy consumption metrics for the selected entity:

• ‘IT Equipment Energy’ gives the total energy consumption of all the IT devices.

• ‘Non IT Facility Energy’, calculated based on the ‘IT Equipment Energy’ and PUE (PUE=Total Facility Energy / IT Equipment Energy, could be specified in Settings page), estimates the energy consumption for non IT facility devices.

• ‘Total Facility Energy’ gives the total energy consumption from the IT devices and the non IT facility (e.g., the cooling system).

If the “Electricity Cost per kWh” and “Currency” are filled, the energy cost is automatically calculated. The energy cost of every row is: the value of “Electricity Cost per kWh” times the energy of the corresponding row. The cost value is rounded to two decimals.

After a policy is enforced on the entity selected, ‘Requested Power Cap’ is plotted in purple in the power trending graph.

Energy Manager will approximate rack level power consumption if some servers in the rack cannot be reached. If a server is not physically in a rack or it does not consume power at all (e.g., is not connected to the power source), you may need to delete the server from the rack immediately for a better power data accuracy.

It is better to periodically synchronize the time of browser and Energy Manager server to ensure the data integrity on web console.