At Least Once

Explore the concept of eventual consistency in distributed systems and event-driven architectures in this conference talk from NDC Oslo 2022. Delve into Pat Helland's "Life Beyond Distributed Transactions" paper, examining choreography and orchestration approaches for ensuring consistency. Learn why asynchronous methods offer increased reliability and discover strategies for handling errors, including retry and reservation techniques. Investigate methods for managing stale data and understand the implications of "at least once" delivery. Conclude with a practical demonstration of the Outbox pattern using the .NET OSS library Brighter and EF Core, showcasing how to implement "at least once" delivery in real-world scenarios.

At Least Once - Ian Cooper - NDC Oslo 2022