I'm coining the phrase 'effectively-once' for message processing with at-least-once + idempotent operations

As cited in DDIA

Viktor Klang. "I'm coining the phrase 'effectively-once' for message processing with at-least-once + idempotent operations." x.com, October 2016. Archived at perma.cc/7DT9-TDG2

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@viktorklang.com on X: "I'm coining the phrase "effectively-once" for message processing with at-least-once + idempotent operations." / X

I'm coining the phrase "effectively-once" for message processing with at-least-once + idempotent operations.

From the page's own metadata at x.com, 2026-08-29.

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perma.cc

https://perma.cc/7DT9-TDG2