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One Serverless Principle to Rule Them All: Idempotency

When it comes to serverless applications one principle rules them all: idempotency. This ability to rerun a function, make a REST API call, or process a message any number of times and ensure the same result is extremely hard to do reliably. In this talk, I’d like to explain and explore the importance of idempotency and discuss how we can implement it in our own systems, including:

  • Idempotency’s relationship with good serverless architecture.
  • How safe retries are impossible without idempotency.
  • Examples of serverless frameworks and tools that help/encourage idempotency.

You’ll leave this talk with a deeper understanding and appreciation for this tongue-twisting principle and start combing through your code with an idempotent eye.

Adrienne Tacke is a Filipina software engineer, keynote speaker, published author of the book Coding for Kids: Python, and a LinkedIn Learning instructor who specializes in Cloud Development courses. Perhaps most important, however, is that she spends way too much money on desserts and ungodly amounts of time playing Age of Empires II.

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