S7E12 | Apache Kafka Delivery Semantics: At Most Once, At Least Once & Exactly Once Explained
Description
In this episode of PithorAcademy Presents: Deep Dive, we break down Kafka Delivery Semantics—the rules that define how reliably messages are delivered in Apache Kafka. Choosing the wrong delivery guarantee can mean lost data, duplicates, or system failures.
We cover:
At-Most-Once Delivery – fastest but may drop messages
At-Least-Once Delivery – reliable but may cause duplicates
Exactly-Once Delivery (EOS) – strongest guarantee with trade-offs
Real-World Analogy – simplifying concepts with email delivery
By the end, you’ll clearly understand how Kafka ensures data consistency, fault tolerance, and business-critical reliability—and when to use each delivery mode in real-world systems.
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