S7E12 | Apache Kafka Delivery Semantics: At Most Once, At Least Once & Exactly Once Explained

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PithorAcademy Presents: Deep Dive

PithorAcademy

266 episodes

40 minutes ago

Welcome to Deep Dive, presented by PithorAcademy. Our mission is to simplify the latest technologies—why they were created, the problems they solve, and how they work—so you're always interview-ready and ahead in your tech journey. Whether you're a Java enthusiast, a cloud-native developer, or scaling microservices, gain real insights from those shaping the tech world. Join us as we unpack topics like Java development, cloud architecture, DevOps, system design, API strategy, career growth, and the ever-evolving tech landscape. Hosted by the PithorAcademy team.

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S7E12 | Apache Kafka Delivery Semantics: At Most Once, At Least Once & Exactly Once Explained

PithorAcademy Presents: Deep Dive

7 minutes 31 seconds

1 month ago

S7E12 | Apache Kafka Delivery Semantics: At Most Once, At Least Once & Exactly Once Explained

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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