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Availability

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Single Points of Failure Reliability System Design

Single Points of Failure: Finding the Hidden Ones

A checkout API runs three replicas across two availability zones behind a load balancer — on paper, no single point of failure. Then one AZ has a networking inc…

Jul 17, 20267 min read

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Availability Reliability System Design

Availability vs Reliability vs Durability

An order API can return responses all day and still charge the wrong amount. It can be temporarily unreachable while every stored order remains safe. It can fai…

Jul 17, 20268 min read

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