Green-Software-Foundation / Green-Software-Foundation/patterns

Reduce Transmitted Data pattern should mention reality of network energy use

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#340 1 comment 0 reactions 1 assignee Claimed by @franziska-warncke View on GitHub
proposed pattern
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Description

**Is your feature request related to a problem? Please describe.**
The pattern for Reduce Transmitted Data ignores the fact that network devices are always "on" and their energy needs are **in**dependent of actual traffic. So reducing traffic has no consequential effect on emissions, unless hardware is added/removed from the network.

I got triggered by this article on the Green Software Foundation site: [measuring serverless emissions](https://greensoftware.foundation/articles/calculating-your-carbon-footprint-a-guide-to-measuring-serverless-app-emissions-o). The article points to the "Reduce Transmitted Data" pattern and assumes that cutting traffic will reduce emissions. While this may be true from an attributional point of view (your 'share' of the energy used on the network) it is not true for the consequential point of view (sending some more traffic or not has no effect on actual energy use and therefore emissions).

The article states that: "When comparing different measurements with varying picture sizes, we observe that the “Reduce transmitted data” pattern can achieve approximately a 4% reduction in carbon emissions".

I consider this statement of 4% reduction highly questionable, since it can only be realized if actual equipment is turned off.

**Describe the solution you'd like**
The pattern for Reduce Transmitted Data should at least point people towards the consequential vs attributional emission models, which are very relevant in this topic.

**Describe alternatives you've considered**
None.

**Additional context**
See for example this presentation about network energy use & emissions, presented at green.io Paris:
https://drive.google.com/file/d/1VehKnslmdvdWyN_8tRHWo-8rKocfZGuc/view
Or a very elaborate article on this topic in general: https://hubblo.org/blog/attributional-vs-consequential/

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