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What does "redundancy" mean in programming?
redundancy is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.
Definition
Having duplicate components — servers, databases, network links — so that if one fails, another takes over. Redundancy is the foundation of high availability and fault tolerance. Deployed across multiple availability zones or regions for geographic resilience.
Example
"Deploy to at least two availability zones — redundancy ensures the app stays up if one zone has an outage."
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