- Each AWS Region contains multiple AZs (typically 3, minimum 3, maximum 6).
- Examples:
ap-southeast-2a,ap-southeast-2b,ap-southeast-2c.
- An AZ consists of one or more discrete data centers with:
- Independent and redundant power
- Independent networking
- Separate connectivity
Design Characteristics
- Physical separation within a Region to provide fault isolation and resilience against disasters.
- Interconnected with high-bandwidth, ultra-low-latency links, enabling synchronous replication and quick failover.
- Designed for high availability, fault tolerance, and disaster recovery scenarios.
Note:
Use Availability Zone (AZ) ID to uniquely identify the Availability Zones across the two AWS Accounts
Example: use usw2-az2 instead of us-west-2