HMC 10.3.1060.0 introduces a new environmental dashboard to view the sustainability metrics of a system. This panel is similar to the Performance and Capacity Monitoring (PCM) functionality, so the panels look similar to those of PCM panels. They can be launched from anywhere PCM can be launched from. A menu to launch the environmental dashboard is usually found next to the launch PCM menu.
Current usage details:
The current usage details display the average consumption data over the last five minutes. This data automatically refreshes every five minutes if the panel is left open. The refresh button can be used to refresh the data manually.
Metrics:
Power usage: It shows the average power consumption over the last five minutes.
Core usage (%): It shows the percentage of utilized proc units in total configurable proc units.
Carbon footprint: Carbon footprint is calculated from the power reading in the HMC. Calculation details are discussed in detail below.
Energy mode: Energy mode is the power-saving mode available in the HMC. Changing the energy mode setting at the HMC level affects the power and temperature readings.
Inlet temperature: The inlet temperature indicates the heat that is generated at the power inlet.
Trends:
The trends display the historical trend of the above metrics. The default view displays data for the last 4 hours. This can be changed to view metrics up to last year. The graph is a dual-axis line graph where power consumption is plotted on the left axis and the metric on the right axis can be changed using the right axis dropdown.
The right axis drop-down consists of all the above metrics, in addition, it provides the option of selecting the unit of inlet air temperature between Celsius and Fahrenheit.
The two fields above the graph display the energy consumption and carbon emissions over the selected period. (i.e. last four hours in the default view).
The carbon emissions dropdown above the graph provides an option to switch between units of carbon emissions. This unit change would be applied to the carbon footprint metric in the graph as well.
Carbon footprint computation:
The carbon footprint is calculated using below formula.
Carbon Footprint(gm/hr) = Power Consumption(watts) * [Power Usage Effectiveness(PUE) * Carbon Intensity (g/Wh)]
Power usage effectiveness and carbon intensity are constants and can vary depending on the data center and region. By default, the values are 1.5 and 0.25g/Wh respectively. These values can be changed using HMC CLI command chpcm.
chpcm command:
chpcm command can be used to change the values of PUE and carbon intensity as below.
chpcm -o s -t energy -a "pue=2,carbon_intensity=0.5"
Please note that the chpcm command always accepts carbon intensity in g/Wh unit.
lspcm command:
lspcm command can be used to list the values of PUE and carbon intensity.
lspcm -t energy
The carbon intensity value listed would be in g/Wh unit.
Export:
The export panel can be used to download the historical metrics data in either Json format or csv format.
In Summary, the new environmental dashboard provides a simplified experience to view the power usage, thermal metrics and carbon footprint and ability to export data for sustainability metrics reporting.
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