Server

Characteristics

Name	Unit	Default value	Description	Example
usage	None	See server usage		..
cpu	None	See cpu		..
ram	None	See ram		..
disk	None	See ssd & hdd	SSD or HDD	..
motherboard	None	See motherboard		..
power_supply	None	See power_supply		..
assembly	None	See assembly	Assembly phase	..
case	None	See case	Enclosure	..

Server usage

In addition to the characteristics available for usage, you can use the following:

Name	Unit	Default value (default;min;max)	Description	Example
other_consumption_ratio	None	0.33;0.2;0.6	Power consumption ratio of other components (except disks) relative to RAM and CPU	0.2
gpu_time_workload	%	65;0;100	Load of the server's GPUs, as a percentage between 0 and 100	80

Complete

The following components are completed with the characteristics taken from the archetype :

• CPU
• RAM
• SSD
• HDD
• power supplies
• case

Embedded impacts

Impacts criteria

Criteria	Implemented	Source
gwp	yes	Bottom-up approach based on Green Cloud Computing, 2021
adp	yes	Bottom-up approach based on Green Cloud Computing, 2021
pe	yes	Bottom-up approach based on Green Cloud Computing, 2021
gwppb	yes	Base IMPACTS® ADEME
gwppf	yes	Base IMPACTS® ADEME
gwpplu	yes	Base IMPACTS® ADEME
ir	yes	Base IMPACTS® ADEME
lu	yes	Base IMPACTS® ADEME
odp	yes	Base IMPACTS® ADEME
pm	yes	Base IMPACTS® ADEME
pocp	yes	Base IMPACTS® ADEME
wu	yes	Base IMPACTS® ADEME
mips	yes	Base IMPACTS® ADEME
adpe	yes	Base IMPACTS® ADEME
adpf	yes	Base IMPACTS® ADEME
ap	yes	Base IMPACTS® ADEME
ctue	yes	Base IMPACTS® ADEME
ctuh_c	yes	Base IMPACTS® ADEME
ctuh_nc	yes	Base IMPACTS® ADEME
epf	yes	Base IMPACTS® ADEME
epm	yes	Base IMPACTS® ADEME
ept	yes	Base IMPACTS® ADEME

Bottom-up approach

\[ \begin{equation} \begin{aligned} \text{server}_\text{embedded}^\text{criteria} & = \sum_{\set{\text{components}}}{\text{component}_ \text{embedded}^\text{criteria}} \\ \\ & = \text{cpu_units} * \text{CPU}_{embedded}^{criteria} \\ & \quad + \ \text{ram_units} * \text{RAM}_{embedded}^{criteria} \\ & \quad + \ \text{ssd_units} * \text{SSD}_{embedded}^{criteria} \\ & \quad + \ \text{hdd_units} * \text{HDD}_{embedded}^{criteria} \\ & \quad + \ \text{motherboard}_{embedded}^{criteria} \\ & \quad + \ \text{power_supply_units} * \text{power_supply}_{embedded}^{criteria} \\ & \quad + \ \text{assembly}_{embedded}^{criteria} \\ & \quad + \ \text{enclosure}_{embedded}^{criteria} \end{aligned} \end{equation} \]

Fix impact factors

Criteria	Unit	value
ir	kg U235 eq.	2320.0
lu	No dimension	-147.0
odp	kg CFC-11 eq.	0.00135
pm	Disease occurrence	0.000113
pocp	kg NMVOC eq.	8.4
wu	m3 eq.	-3710.0
mips	kg	10600.0
adpe	kg SB eq.	0.0378
adpf	MJ	51500.0
ap	mol H+ eq.	19.7
ctue	CTUe	48400.0
ctuh-c	CTUh	1.94e-07
ctuh-nc	CTUh	1.87e-05
epf	kg P eq.	-0.258
epm	kg N eq.	2.94
ept	mol N eq.	27.0

Usage impact

Both power consumption and consumption profile are implemented.

Consumption profile

A server consumption profile is of the form :

\[ \text{CP}_{\text{component}} = \text{consumption_profile}_{\text{component}} \]

\[ \text{CP}(\text{workload}) = (\text{CP}_{\text{CPU}}(\text{workload}) + \text{CP}_{\text{RAM}}(\text{workload})) * (1 + \text{other_consumption_ratio}) + \text{P}_{\text{disks}} + \text{P}_{\text{GPU}}(\text{gpu_workload}) * \text{GPU.units} \]

\(\text{CP}_{\text{CPU}}(\text{workload})\) and \(\text{CP}_{\text{RAM}}(\text{workload})\) depend on the technical characteristics of the RAM and CPU. \(\text{P}_{\text{disks}}\) is the power of the local drives: a constant power per drive (see SSD and HDD) multiplied by the number of drives. It is added outside of \(\text{other_consumption_ratio}\), so that the drives are not counted twice. \(\text{P}_{\text{GPU}}\) is the power of one GPU: its avg_power if given, otherwise modelled from its TDP (see GPU). It is also added outside of \(\text{other_consumption_ratio}\). \(\text{gpu_workload}\) is gpu_time_workload, 65% by default: it does not follow the server's time_workload. A time_workload set in the GPU's own usage takes precedence. \(\text{other_consumption_ratio}\) is used to account for the electrical consumption of the other components (other than RAM, CPU and disks).