name: google-cloud-waf-sustainability metadata: version: "1.0.1" category: WellArchitectedFramework description: >- Provides recommendations for environmental sustainability, carbon footprint reduction, and energy efficiency based on the Sustainability pillar of the Google Cloud Well-Architected Framework (WAF). Use when the user asks to assess, design, or optimize Google Cloud workloads for sustainability—including the shared responsibility model, selecting low-carbon regions (CFE%), reducing resource and AI/ML energy waste, designing efficient software and storage lifecycles, or measuring and tracking emissions using Google Cloud Carbon Footprint. Don't use for financial cost reduction (use google-cloud-waf-cost-optimization), latency and throughput tuning (use google-cloud-waf-performance-optimization), or high availability and disaster recovery (use google-cloud-waf-reliability).

Google Cloud Well-Architected Framework skill for the Sustainability pillar

Overview

The Sustainability pillar of the Google Cloud Well-Architected Framework provides principles and recommendations to help you minimize the environmental impact of your cloud workloads. It focuses on a shared responsibility model—Google optimizes the sustainability of the cloud, while customers optimize sustainability in the cloud. By making informed decisions about architecture, resource allocation, and region selection, you can significantly reduce your carbon footprint and improve overall energy efficiency.

Core principles

The recommendations in the sustainability pillar of the Well-Architected Framework are aligned with the following core principles:

• Shared responsibility: Define the boundaries of responsibility and embrace a shared fate model, working with your cloud provider and partners to achieve optimal environmental outcomes for the entire ecosystem. Grounding document: https://docs.cloud.google.com/architecture/framework/sustainability.md.txt

• Use regions that consume low-carbon energy: Prioritize Google Cloud regions with a high percentage of Carbon-Free Energy (CFE) and "Low CO2" indicators to lower the gross carbon emissions of your deployments. Grounding document: https://docs.cloud.google.com/architecture/framework/sustainability/low-carbon-regions.md.txt

• Optimize AI and ML workloads: Maximize computations per watt by matching algorithmic needs to specialized hardware (like TPUs) and applying mathematical techniques to reduce computational complexity. Grounding document: https://docs.cloud.google.com/architecture/framework/sustainability/ai-ml-energy-efficiency.md.txt

• Optimize resource usage: Eliminate energy waste by scaling resources to zero when idle, rightsizing virtual machines, and prioritizing managed services that dynamically match actual demand. Grounding document: https://docs.cloud.google.com/architecture/framework/sustainability/optimize-resource-usage.md.txt

• Develop energy-efficient software: Design your applications to minimize unnecessary CPU, memory, and network activity on both backend servers and end-user devices by using event-driven logic and optimized assets. Grounding document: https://docs.cloud.google.com/architecture/framework/sustainability/energy-efficient-software.md.txt

• Optimize data and storage: Reduce the environmental footprint of your storage by implementing lifecycle management to archive cold data and eliminating "dark data" that provides no business value. Grounding document: https://docs.cloud.google.com/architecture/framework/sustainability/optimize-storage.md.txt

• Continuously measure and improve: Gain visibility into your carbon emissions by analyzing granular data, identifying hotspots, and taking proactive steps to remediate inefficiencies. Grounding document: https://docs.cloud.google.com/architecture/framework/sustainability/continuously-measure-improve.md.txt

• Promote a culture of sustainability: Embed sustainability into your organizational governance, connect technical decisions to environmental goals, and ensure staff have the skills to implement green practices. Grounding document: https://docs.cloud.google.com/architecture/framework/sustainability/culture.md.txt

• Align sustainability practices with industry guidelines: Ensure that your sustainability initiatives are aligned with industry guidelines for measurement, reporting, and verification, such as W3C Web Sustainability Guidelines, Green Software Foundation, and Greenhouse Gas Protocol. Grounding document: https://docs.cloud.google.com/architecture/framework/sustainability/industry-guidelines.md.txt

Relevant Google Cloud products

The following are examples of Google Cloud products and features that are relevant to sustainability:

• Visibility and measurement:

  • Carbon Footprint: Provides dashboard visibility into greenhouse gas emissions associated with Google Cloud usage.
  • BigQuery: Analyzes exported Carbon Footprint data alongside billing data to identify emission hotspots.

• Infrastructure and operations:

  • Google Cloud Region Picker: Helps weigh carbon footprint, cost, and latency when selecting deployment locations.
  • Active Assist / Recommender: Automatically identifies idle resources and provides VM rightsizing recommendations to reduce waste.
  • Cloud Run / GKE Autopilot: Fully managed compute environments that optimize cluster usage and can scale to zero when idle.
  • Cloud Batch: Optimizes the scheduling of batch jobs, allowing execution during periods of high Carbon-Free Energy.
  • Spot VMs: Utilizes unused data center capacity for fault-tolerant workloads, improving overall hardware efficiency.

• Data and AI:

  • Cloud Storage Lifecycle Management: Automatically transitions older data to lower-energy storage classes (Nearline, Coldline, Archive).
  • Cloud TPUs: Specialized hardware optimized for the energy efficiency of large-scale AI/ML matrix multiplications.

Workload assessment questions

Ask appropriate questions to understand the sustainability-related requirements and constraints of the workload and the user's organization. Choose questions from the following list:

• Cloud sustainability:

  • How do you define the boundaries of sustainability responsibility between your organization and your cloud provider?
  • How do you leverage cloud capabilities and AI to drive sustainability outcomes for your broader business operations?
  • How does your cloud strategy account for the sustainability impact of your partner ecosystem and multi-cloud environments?

• Use regions that consume low-carbon energy:

  • How do you incorporate carbon intensity into your Google Cloud region selection strategy?

• Optimize AI and ML workloads:

  • How do you optimize the energy efficiency of your AI and machine learning lifecycles?

• Optimize resource usage:

  • How do you ensure your infrastructure footprint dynamically matches actual workload demand?
  • How do you select and maintain the hardware types used for your cloud workloads?
  • What is your strategy for handling non-urgent or compute-intensive background tasks?
  • How do you balance the need for high availability and disaster recovery with sustainability?

• Develop energy-efficient software:

  • How do you ensure your backend logic minimizes unnecessary CPU, memory, and network activity?
  • How do you manage the overall efficiency and maintenance of your codebase for sustainability?
  • How do you minimize the data volume and processing load that your application places on end-user devices?
  • How does your user experience (UX) design contribute to energy efficiency for the end user?

• Optimize data and storage:

  • What process do you have for managing the environmental footprint of your data and storage?

• Continuously measure and improve:

  • How do you analyze your carbon data to prioritize optimization efforts?
  • How is sustainability measurement embedded into your organization’s governance and culture?
  • What is your current process for gaining visibility into your cloud-related carbon emissions?
  • What proactive steps do you take to remediate identified carbon hotspots?

• Promote a culture of sustainability:

  • How do you connect individual technical decisions to the organization's mission and hold teams accountable for results?
  • How do you ensure your technical and business staff have the specific skills required to implement sustainability practices?

Validation checklist

Use the following checklist to evaluate the architecture's alignment with sustainability recommendations:

• Cloud sustainability:

  • [ ] The organization embraces a shared responsibility and shared fate model for sustainability.
  • [ ] AI is used as a catalyst for profitability and resilience to streamline operations, or sustainability is integrated into the design process to create positive feedback loops.
  • [ ] Collaborations with sustainable partners are prioritized and multi-cloud data portability is leveraged, or internal practices align with recognized global standards like the Green Software Foundation.

• Use regions that consume low-carbon energy:

  • [ ] A data-driven policy prioritizes regions with high Carbon-Free Energy (CFE%) and "Low CO2" indicators, or the Google Cloud Region Picker is actively used to balance carbon footprint with cost and latency.

• Optimize AI and ML workloads:

  • [ ] Algorithmic needs are matched to specialized hardware (TPUs) to maximize computations per watt, or mathematical techniques like model compression and PEFT are applied to reduce computational complexity.

• Optimize resource usage:

  • [ ] Fully managed services that scale to zero when idle are utilized, or Horizontal Pod Autoscaling (HPA) and Vertical Pod Autoscaling (VPA) are used in GKE to prevent over-provisioning.
  • [ ] A formal process exists to upgrade to the newest machine types for improved performance-per-watt, or workloads are actively matched to specialized machine families.
  • [ ] Batch jobs are proactively scheduled to run during periods or in regions with the highest proportion of CFE, or Spot VMs are utilized for non-critical batch jobs.
  • [ ] "Cold DR" or serverless failover is prioritized to ensure secondary regions remain at zero energy consumption until an event occurs, or Infrastructure as Code (IaC) is used to rapidly provision a recovery environment only when needed.

• Develop energy-efficient software:

  • [ ] Resource-intensive busy loops or constant polling are replaced with event-driven logic, or algorithms with optimal time complexity and data structures are prioritized.
  • [ ] The "Don't Repeat Yourself" (DRY) principle is adhered to with regular refactoring, or intelligent caching (e.g., Memorystore) is implemented with smart eviction policies.
  • [ ] The download size of website products is measured and maintained against a strict budget, or CI/CD pipelines automate the minimization and compression of HTML, CSS, and JS files.
  • [ ] Static sites or Progressive Web Apps (PWAs) are preferred for fas