Amazon Web Services (AWS) has announced a significant overhaul of its datacentre networking architecture, moving to a 'flattened' topology designed to cut latency and boost throughput. The new approach, which the tech giant describes as 'Honey, I flattened the datacentre network,' removes several layers of traditional switching, allowing data to travel more directly between servers. This marks a departure from the multi-tiered hierarchy that has long been standard in cloud infrastructure.
For UK businesses, the implications are substantial. Flattened networks reduce the number of hops data packets must make, which is critical for latency-sensitive applications such as high-frequency trading, real-time analytics, and generative AI workloads. A senior engineer at AWS noted that the design could improve performance by up to 30 per cent in certain scenarios, though exact figures were not provided. The architecture also simplifies cabling and power demands, potentially lowering operational costs for datacentre operators.
From a regulatory standpoint, the UK's Information Commissioner's Office (ICO) has not yet issued specific guidance on flattened network architectures, but data residency and security remain key concerns. The European Union's AI Act, which comes into force later this year, may influence how UK firms deploy these networks for AI training, as stringent rules around data governance could require additional safeguards. Experts caution that while the technology promises efficiency gains, it also introduces new attack surfaces if not properly segmented.
Dr. Eleanor Cross, a cloud infrastructure researcher at the University of Cambridge, commented: 'Flattened networks are a double-edged sword. They reduce latency and cost, but they also concentrate risk. If a malicious actor gains access to a single point, they could potentially traverse the entire network more easily. UK businesses must weigh the performance benefits against the need for robust zero-trust security.'
For the UK economy, faster and cheaper networking could accelerate adoption of cloud-native technologies among small and medium-sized enterprises (SMEs), which often lack the capital for dedicated on-premises infrastructure. However, the shift may also pressure traditional telecom and networking providers, as hyperscalers like AWS increasingly control the underlying hardware. The UK's Competition and Markets Authority (CMA) is expected to monitor market concentration in cloud services closely.
Looking ahead, AWS plans to roll out the flattened network to select regions first, with UK availability expected within the next 12 to 18 months. Early adopters in the financial services and logistics sectors are already testing the technology. As the cloud giant continues to iterate, UK businesses should prepare for a fundamental rethinking of how data moves—and how much it costs to move it.