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Re:Amazon packages pile up after AWS outage spawns delivery ... by chrisseaton on Tuesday December 07, 2021 @10:48PM (#29481052)
AZs are in one physical location. If that physical location has a problem, all AZs within it will go down.
Re:Amazon packages pile up after AWS outage spawns delivery ... by notatoad on Wednesday December 08, 2021 @12:46AM (#29481626)
>An Availability Zone (AZ) is one or more discrete data centers with redundant power, networking, and connectivity in an AWS Region... AZs are physically separated by a meaningful distance, many kilometers, from any other AZ, although all are within 100 km (60 miles) of each other.

https://aws.amazon.com/about-aws/global-infrastructure/regio...