AWS Global Infrastructure

AWS has built one of the largest and most reliable cloud infrastructures in the world. Understanding how this infrastructure is organised is essential for designing applications that are highly available, fault-tolerant, and performant.

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Key Concepts

AWS infrastructure is organised into three main components:

1. Regions — geographical areas containing multiple data centres
2. Availability Zones (AZs) — isolated data centre groups within a region
3. Edge Locations — endpoints for content delivery and caching

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Regions

An AWS Region is a physical location in the world where AWS clusters data centres.

Key Facts About Regions

• Each region is completely independent and isolated from other regions
• Data does not replicate between regions unless you explicitly configure it
• Each region has a code name, e.g., eu-west-2 (London), us-east-1 (N. Virginia)
• Not all services are available in every region

Choosing a Region

When selecting a region, consider these factors: