Exactly Once Delivery vs At Least Once Delivery
Developers should learn and implement Exactly Once Delivery when building systems that cannot tolerate duplicate or missing data, such as payment processing, order fulfillment, or real-time analytics pipelines meets developers should use at least once delivery when building systems where message loss is unacceptable, such as financial transactions, order processing, or audit logging, as it prioritizes reliability over exactly-once semantics. Here's our take.
Exactly Once Delivery
Developers should learn and implement Exactly Once Delivery when building systems that cannot tolerate duplicate or missing data, such as payment processing, order fulfillment, or real-time analytics pipelines
Exactly Once Delivery
Nice PickDevelopers should learn and implement Exactly Once Delivery when building systems that cannot tolerate duplicate or missing data, such as payment processing, order fulfillment, or real-time analytics pipelines
Pros
- +It is essential in scenarios where data integrity is paramount, preventing issues like double-charging or incorrect state updates
- +Related to: distributed-systems, message-queues
Cons
- -Specific tradeoffs depend on your use case
At Least Once Delivery
Developers should use At Least Once Delivery when building systems where message loss is unacceptable, such as financial transactions, order processing, or audit logging, as it prioritizes reliability over exactly-once semantics
Pros
- +It is essential in scenarios with network partitions, producer/consumer failures, or when using asynchronous messaging systems like Apache Kafka or RabbitMQ
- +Related to: distributed-systems, message-queues
Cons
- -Specific tradeoffs depend on your use case
The Verdict
Use Exactly Once Delivery if: You want it is essential in scenarios where data integrity is paramount, preventing issues like double-charging or incorrect state updates and can live with specific tradeoffs depend on your use case.
Use At Least Once Delivery if: You prioritize it is essential in scenarios with network partitions, producer/consumer failures, or when using asynchronous messaging systems like apache kafka or rabbitmq over what Exactly Once Delivery offers.
Developers should learn and implement Exactly Once Delivery when building systems that cannot tolerate duplicate or missing data, such as payment processing, order fulfillment, or real-time analytics pipelines
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