Gunnar Morling • 11/25/2025

On Idempotency Keys

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This technical article explores idempotency keys as a mechanism for achieving exactly-once processing in distributed systems. It details how consumers use these keys to detect and ignore duplicate messages, emphasizing atomic transaction handling. The analysis compares different key generation strategies, including UUIDs (v4/v7) and monotonically increasing sequences, discussing their trade-offs in storage and duplicate detection.

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#distributed systems #Idempotency #Message Processing
On Idempotency Keys

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