Exactly Once Delivery vs At Most 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 most once delivery when building systems where high throughput and low latency are critical, and occasional message loss is tolerable, such as in real-time analytics, logging, or monitoring applications. 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 Most Once Delivery
Developers should use At Most Once Delivery when building systems where high throughput and low latency are critical, and occasional message loss is tolerable, such as in real-time analytics, logging, or monitoring applications
Pros
- +It simplifies implementation by avoiding complex deduplication or acknowledgment mechanisms, making it ideal for fire-and-forget messaging patterns in event-driven architectures
- +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 Most Once Delivery if: You prioritize it simplifies implementation by avoiding complex deduplication or acknowledgment mechanisms, making it ideal for fire-and-forget messaging patterns in event-driven architectures 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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