What is Edge Location?
Also known as: PoP
An edge location is a data center or point of presence deployed by a cloud provider at the network edge to serve content and run compute workloads closer to end users than a full parent region.
An edge location is a geographically distributed facility that a cloud provider operates at the network edge, often within or near major internet exchange points, metropolitan areas, or last-mile networks. Unlike full cloud regions which host the full suite of services, persistent storage, and virtual machines, edge locations are smaller, purpose-built deployments optimized for low latency content delivery and lightweight compute. They form the physical infrastructure behind content delivery networks (CDNs) and edge compute services such as AWS CloudFront, CloudFront Functions, Lambda@Edge, and AWS WAF.
The typical edge location caches static and dynamic web content, video streams, API responses, and software downloads so that end users retrieve data from the nearest node instead of traversing the public internet to a distant parent region. When a user requests content, DNS resolution points the client to the optimal edge location using latency-based routing or geolocation. The edge location either serves the cached object or fetches it from the origin (the customer's server or a cloud region) and caches it for subsequent requests. Beyond caching, some edge locations run serverless compute functions triggered by HTTP requests, enabling low-latency processing like URL rewrites, A/B testing, authentication, and image transformation without provisioning servers.
In the cloud stack, edge locations sit between the end user and the cloud provider's regional data centers. They abstract away the physical distance between users and compute/storage resources. Providers like Amazon Web Services (AWS), Cloudflare, and Google Cloud each maintain hundreds of edge locations worldwide, far exceeding the number of full regions. Edge locations do not offer persistent block storage or relational databases; those services remain in parent regions. This architecture enables latencies under 10 milliseconds for many global users while keeping origin servers in a small number of regions.
Key facts
- Edge locations are distinct from cloud regions; they have limited compute and no persistent storage.
- Each edge location is connected to the parent region through dedicated high-bandwidth links.
- Origins can be an AWS Region, an on-premises server, or another cloud provider.
- DNS routing to the nearest edge location is typically based on latency or geographic proximity.
- Edge locations can run Lambda functions for compute, not just cache content.
How it works in practice
Related terms
References
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