Green IT

Efficiency cuts power consumption and operating costs at once

Sustainability in IT affects operating costs directly. A green IT strategy reduces energy consumption, lowers infrastructure costs, and improves the company's ESG (Environmental, Social, Governance) rating.

We consider the entire lifecycle: from hardware procurement through software development (Green Coding) to operation in climate-neutral data centres.

Anti-Patterns: The Invisible Footprint

The global IT infrastructure is responsible for a significant share of worldwide CO2 emissions. Inefficient code structures, unnecessary data redundancy, and poorly utilised server capacities (zombies) waste resources and increase TCO. Without measurability, sustainability in IT remains a vague promise.

The Pillars of Sustainability

1. Green Coding: Developing software that requires as few CPU cycles and memory as possible. Efficient algorithms are directly correlated with lower power consumption.
2. Climate-Neutral Hosting: Preference for cloud providers and data centres that run 100% on renewable energy and have high energy efficiency (PUE value).
3. Infrastructure Right-Sizing: Avoiding overcapacities through consistent use of Auto-Scaling and Serverless architectures.
4. Lifecycle Management: Extending the useful life of hardware and ensuring professional recycling.
5. Sustainable Data Management: Reducing Dark Data through deletion concepts and efficient compression methods.

The Advantage: Double Impact

Every kilowatt-hour of electricity saved not only protects the environment but also directly lowers IT operating costs.

FAQ

Is Green IT not more expensive than conventional IT?

Initially, the effort for optimisations can be higher. Long-term, efficiency typically lowers costs. Green IT is the optimisation of resource waste.

Does our code really make a difference in CO2 consumption?

Yes. In large systems, inefficient loops or unnecessary API calls add up millions of times. The Software Carbon Intensity (SCI) is a measurable metric for any codebase.

References

• Green Software Foundation Principles of Green Software Engineering. Eight foundational rules for sustainable development and standards for sustainable software. (2023). greensoftware.foundation
• Microsoft Learn Sustainable Software Engineering. Guide for applying Green Software principles in practice. (2022). learn.microsoft.com/en-us/training/modules/sustainable-software-engineering-overview/
• Wikipedia Power Usage Effectiveness (PUE). The standard for measuring the energy efficiency of data centres. (2007). en.wikipedia.org/wiki/Power_usage_effectiveness