Sustainability Metrics

Sustainability metrics are collected for virtual machine, host system, cluster compute resource, and vSphere World object types.

Metric Names


Metric Name	Object Type	Description
Power\|Total Energy (Wh)	Virtual Machine	Total energy used. Formula: Total Energy (Wh) = Sum(Power\|Energy (Joule))/3600
Power\|Total Energy (Wh)	Host System	Total energy used. Formula: Total Energy (Wh) = Sum(Power\|Energy (Joule))/3600
Sustainability\|CO2 Emission (Kg)	Cluster Compute Resource	Carbon dioxide emissions. Calculated as power consumption* CO2 Emission rate Formula: CO2 Emission (Kg) = Sum(Host System(Power\|Total Energy(Wh)))/1000 * 0.709
Sustainability\|CO2 Emission before Virtualization (Kg)	Cluster Compute Resource	Carbon dioxide emissions before virtualization, assuming that power consumption per physical server is 100W, reflecting a low end hardware specification. Formula: CO2 Emission before Virtualization (Kg) = Summary\|Number of Running VMs * 0.1 * 0.709
Sustainability\|CO2 Emission by Idle VMs (Kg)	Cluster Compute Resource	Total carbon dioxide emission from all idle VMs. Calculated as CO2 emission rate * Power consumed by Idle VMs, where the rate is set at cluster property / 1000. Formula: CO2 Emission by Idle VMs (Kg) = Sum(VM(Power\|Total Energy (Wh)), If VM(Summary\|Reclaimable Idle = 1) * 0.709 OR CO2 Emission by Idle VMs (Kg) = Power Wasted by Idle VMs (Wh) * 0.709
Sustainability\|Electricity Cost Savings	Cluster Compute Resource	Estimated cost savings by virtualizing workloads. Calculated from the difference between power consumption before virtualization and after virtualization. The electricity cost is defined at the cluster custom property. Formula: Electricity Cost Savings = (Summary\|Number of Running VMs * 0.1 - Sum(Host System(Power\|Total Energy(Wh)))/1000) * 0.108 OR Daily Electricity Cost Savings = (Summary\|Number of Running VMs * 0.1 - Power usage (KWh)) * 0.108
Sustainability\|Power usage (KWh)	Cluster Compute Resource	Power usage calculated from all hosts in KWh. Formula: Power usage (KWh) = Sum(Host System(Power\|Total Energy(Wh))/1000
Sustainability\|Power usage per GHz (Wh)	Cluster Compute Resource	Power usage efficiency. Calculated as power consumption over total GHz. Formula: Power usage per GHz (Wh) = Sum(Host System(Power\|Total Energy(Wh))/CPU\|Usage (MHz)/1000
Sustainability\|Power Wasted by Idle VMs (Wh)	Cluster Compute Resource	Sum of electricity power used by all VMs classified as idle by the system. Formula: Power Wasted by Idle VMs (Wh) = Sum(VM(Power\|Total Energy (Wh)), If VM(Summary\|Reclaimable Idle = 1)
Sustainability\|Trees to Offset Idle VMs CO2 Emission	Cluster Compute Resource	Number of standard trees required to compensate CO2 emission of all Idle VMs. Based on 36.4 pound of carbon per tree. Formula: Trees to Offset Idle VMs CO2 Emission = Sum(VM(Power\|Total Energy (Wh)), If VM(Summary\|Reclaimable Idle = 1)/1000 * 0.709 / 16.511 OR Trees to Offset Idle VMs CO2 Emission = Power Wasted by Idle VMs (Wh)/1000 * 0.709 / 16.511
Sustainability\|CO2 Emission (Kg)	vSphere World	Total carbon dioxide emissions. Calculated as sum of carbon emission from all clusters. Formula: CO2 Emission (Kg) = Sum(Cluster(Sustainability\|CO2 Emission (Kg))
Sustainability\|CO2 Emission before Virtualization (Kg)	vSphere World	Total carbon dioxide emissions before virtualization. Calculated as the sum of CO2 emission from all clusters. Formula: CO2 Emission before Virtualization (Kg) = Sum(Cluster(Sustainability\|CO2 Emission before Virtualization (Kg)))
Sustainability\|CO2 Emission Avoided (T)	vSphere World	Carbon emissions avoided with virtualization. Calculated by difference in values of carbon emissions before and after virtualization and converting value in Kg to Tonnes. Formula: CO2 Emission Avoided (T) = (CO2 Emission before Virtualization (Kg) - CO2 Emission (Kg)) / 1000
Sustainability\|Electricity Cost Savings	vSphere World	Total estimated cost savings by virtualizing workloads at vSphere World. Calculated as the sum of Electricity cost savings. Formula: Electricity Cost Savings = Sum(Cluster(Daily Electricity Cost Savings))
Sustainability\|Power Savings with Virtualization (%)	vSphere World	Percentage of power savings achieved by virtualization. Calculated by Formula = (Power usage before Virtualization - Power usage after Virtualization)/Power usage before Virtualization 100. Formula: Power Savings with Virtualization (%) =( Power usage Before Virtualization (KWh) - Power usage (KWh) ) / Power usage Before Virtualization (KWh) 100
Sustainability\|Power usage (KWh)	vSphere World	Power usage calculated from all hosts in KWh. Formula: Power usage (KWh) = Sum(Host System(Power\|Total Energy(Wh)))/1000
Sustainability\|Power usage Before Virtualization (KWh)	vSphere World	Power usage assuming that each low range server consumes 0.1 KWh. Formula: Power usage Before Virtualization (KWh) = Summary\|Number of Running VMs * 0.1
Sustainability\|Power Wasted by Idle VMs (Wh)	vSphere World	Sum of electricity power used by all VMs classified as idle by the system. Formula: Power Wasted by Idle VMs (Wh) = Sum((VM(Power\|Total Energy (Wh)), If VM(Summary\|Reclaimable Idle = 1))

Metric Name	Object Type	Description
Power\|Total Energy (Wh)	Virtual Machine	Total energy used. Formula: Total Energy (Wh) = Sum(Power\|Energy (Joule))/3600
Power\|Total Energy (Wh)	Host System	Total energy used. Formula: Total Energy (Wh) = Sum(Power\|Energy (Joule))/3600
Sustainability\|CO2 Emission (Kg)	Cluster Compute Resource	Carbon dioxide emissions. Calculated as power consumption* CO2 Emission rate Formula: CO2 Emission (Kg) = Sum(Host System(Power\|Total Energy(Wh)))/1000 * 0.709
Sustainability\|CO2 Emission before Virtualization (Kg)	Cluster Compute Resource	Carbon dioxide emissions before virtualization, assuming that power consumption per physical server is 100W, reflecting a low end hardware specification. Formula: CO2 Emission before Virtualization (Kg) = Summary\|Number of Running VMs * 0.1 * 0.709
Sustainability\|CO2 Emission by Idle VMs (Kg)	Cluster Compute Resource	Total carbon dioxide emission from all idle VMs. Calculated as CO2 emission rate * Power consumed by Idle VMs, where the rate is set at cluster property / 1000. Formula: CO2 Emission by Idle VMs (Kg) = Sum(VM(Power\|Total Energy (Wh)), If VM(Summary\|Reclaimable Idle = 1) * 0.709 OR CO2 Emission by Idle VMs (Kg) = Power Wasted by Idle VMs (Wh) * 0.709
Sustainability\|Electricity Cost Savings	Cluster Compute Resource	Estimated cost savings by virtualizing workloads. Calculated from the difference between power consumption before virtualization and after virtualization. The electricity cost is defined at the cluster custom property. Formula: Electricity Cost Savings = (Summary\|Number of Running VMs * 0.1 - Sum(Host System(Power\|Total Energy(Wh)))/1000) * 0.108 OR Daily Electricity Cost Savings = (Summary\|Number of Running VMs * 0.1 - Power usage (KWh)) * 0.108
Sustainability\|Power usage (KWh)	Cluster Compute Resource	Power usage calculated from all hosts in KWh. Formula: Power usage (KWh) = Sum(Host System(Power\|Total Energy(Wh))/1000
Sustainability\|Power usage per GHz (Wh)	Cluster Compute Resource	Power usage efficiency. Calculated as power consumption over total GHz. Formula: Power usage per GHz (Wh) = Sum(Host System(Power\|Total Energy(Wh))/CPU\|Usage (MHz)/1000
Sustainability\|Power Wasted by Idle VMs (Wh)	Cluster Compute Resource	Sum of electricity power used by all VMs classified as idle by the system. Formula: Power Wasted by Idle VMs (Wh) = Sum(VM(Power\|Total Energy (Wh)), If VM(Summary\|Reclaimable Idle = 1)
Sustainability\|Trees to Offset Idle VMs CO2 Emission	Cluster Compute Resource	Number of standard trees required to compensate CO2 emission of all Idle VMs. Based on 36.4 pound of carbon per tree. Formula: Trees to Offset Idle VMs CO2 Emission = Sum(VM(Power\|Total Energy (Wh)), If VM(Summary\|Reclaimable Idle = 1)/1000 * 0.709 / 16.511 OR Trees to Offset Idle VMs CO2 Emission = Power Wasted by Idle VMs (Wh)/1000 * 0.709 / 16.511
Sustainability\|CO2 Emission (Kg)	vSphere World	Total carbon dioxide emissions. Calculated as sum of carbon emission from all clusters. Formula: CO2 Emission (Kg) = Sum(Cluster(Sustainability\|CO2 Emission (Kg))
Sustainability\|CO2 Emission before Virtualization (Kg)	vSphere World	Total carbon dioxide emissions before virtualization. Calculated as the sum of CO2 emission from all clusters. Formula: CO2 Emission before Virtualization (Kg) = Sum(Cluster(Sustainability\|CO2 Emission before Virtualization (Kg)))
Sustainability\|CO2 Emission Avoided (T)	vSphere World	Carbon emissions avoided with virtualization. Calculated by difference in values of carbon emissions before and after virtualization and converting value in Kg to Tonnes. Formula: CO2 Emission Avoided (T) = (CO2 Emission before Virtualization (Kg) - CO2 Emission (Kg)) / 1000
Sustainability\|Electricity Cost Savings	vSphere World	Total estimated cost savings by virtualizing workloads at vSphere World. Calculated as the sum of Electricity cost savings. Formula: Electricity Cost Savings = Sum(Cluster(Daily Electricity Cost Savings))
Sustainability\|Power Savings with Virtualization (%)	vSphere World	Percentage of power savings achieved by virtualization. Calculated by Formula = (Power usage before Virtualization - Power usage after Virtualization)/Power usage before Virtualization 100. Formula: Power Savings with Virtualization (%) =( Power usage Before Virtualization (KWh) - Power usage (KWh) ) / Power usage Before Virtualization (KWh) 100
Sustainability\|Power usage (KWh)	vSphere World	Power usage calculated from all hosts in KWh. Formula: Power usage (KWh) = Sum(Host System(Power\|Total Energy(Wh)))/1000
Sustainability\|Power usage Before Virtualization (KWh)	vSphere World	Power usage assuming that each low range server consumes 0.1 KWh. Formula: Power usage Before Virtualization (KWh) = Summary\|Number of Running VMs * 0.1
Sustainability\|Power Wasted by Idle VMs (Wh)	vSphere World	Sum of electricity power used by all VMs classified as idle by the system. Formula: Power Wasted by Idle VMs (Wh) = Sum((VM(Power\|Total Energy (Wh)), If VM(Summary\|Reclaimable Idle = 1))