Availability Zone

Noun · Development

Definitions

  1. A physically separate data center within a cloud region, with independent power, cooling, and networking. Deploying across multiple AZs provides high availability — if one AZ suffers an outage, the others continue serving traffic. Most cloud regions have 3+ AZs.

    In plain English: A separate data center within a cloud region, so your app stays up even if one building has a power outage.

    Example: "Run at least two replicas across different availability zones — last month us-east-1a had a full power failure."

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