--- title: "#idempotence articles | Hashnode" description: "Explore 32 articles tagged #idempotence on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/idempotence" --- Tag # #idempotence 32 posts · 1 followers [ZyVOP](https://hashnode.com/@zyvop) · [Oct 21](https://hashnode.com/posts/kafka-delivery-guarantees-at-most-once-at-least-once-and-exactly-once-pe0u6/6ad86e652811ccdb9f7d91d1) ### [Kafka Delivery Guarantees: At-Most-Once, At-Least-Once, and Exactly-Once](https://blog.zyvop.com/kafka-delivery-guarantees-at-most-once-at-least-once-and-exactly-once-pe0u6?utm_source=hashnode&utm_medium=feed) At-most-once, at-least-once, and exactly-once explained, with the producer, consumer, and transaction settings that decide which one you get. 9 min read · [blog.zyvop.com](https://blog.zyvop.com/kafka-delivery-guarantees-at-most-once-at-least-once-and-exactly-once-pe0u6?utm_source=hashnode&utm_medium=feed) [Kashif Reza](https://hashnode.com/@kashifrezatech) · [Sep 8](https://hashnode.com/posts/handling-duplicate-events-safely-with-idempotency/6a9fd8b57305a08eb15ab12e) ### [Handling Duplicate Events Safely with Idempotency](https://architecture-in-practice.hashnode.dev/handling-duplicate-events-safely-with-idempotency?utm_source=hashnode&utm_medium=feed) Learn how idempotency helps event-driven systems handle duplicate events safely and prevent repeated business side effects. 7 min read · [architecture-in-practice.hashnode.dev](https://architecture-in-practice.hashnode.dev/handling-duplicate-events-safely-with-idempotency?utm_source=hashnode&utm_medium=feed) [Md Tarikul Islam](https://hashnode.com/@Tarikul001) · [Jun 13](https://hashnode.com/posts/the-saga-pattern-in-node-js-roll-back-distributed-transactions-across-microservices/6a2cfc9713c6ff659c6c31d1) ### [The Saga Pattern in Node.js: How to Roll Back Distributed Transactions Across Microservices](https://freecodecamp.org/news/the-saga-pattern-in-node-js-roll-back-distributed-transactions-across-microservices?utm_source=hashnode&utm_medium=feed) Building reliable workflows across multiple microservices is challenging. In a monolith, a database transaction can ensure that multiple operations either succeed or fail together. But once data is sp 21 min read · [freecodecamp.org](https://freecodecamp.org/news/the-saga-pattern-in-node-js-roll-back-distributed-transactions-across-microservices?utm_source=hashnode&utm_medium=feed) [Ernesto Yanac Huertas](https://hashnode.com/@ErnestoYanac) · [May 23](https://hashnode.com/posts/how-to-implement-idempotency-in-a-nestjs-postgresql-stack-without-losing-sleep-over-duplicate-requests/6a116d411a3cf7bffcfbcb1f) ### [How to Implement Idempotency in a NestJS + PostgreSQL Stack (Without Losing Sleep Over Duplicate Requests)](https://ernestoyanac.com/how-to-implement-idempotency-in-a-nestjs-postgresql-stack-without-losing-sleep-over-duplicate-requests?utm_source=hashnode&utm_medium=feed) A practical guide to implementing idempotency in a Vue + NestJS + PostgreSQL stack using idempotency keys, a custom Guard, and raw SQL — no ORM required. 5 min read · [ernestoyanac.com](https://ernestoyanac.com/how-to-implement-idempotency-in-a-nestjs-postgresql-stack-without-losing-sleep-over-duplicate-requests?utm_source=hashnode&utm_medium=feed) [Dayul Lee](https://hashnode.com/@dayul) · [May 13](https://hashnode.com/posts/network-part-5-cdn-websocket-and-idempotency-when-the-parts-meet-traffic/6a04bc19a0c1540277626a29) ### [Network Part 5 - CDN, WebSocket, and Idempotency: When the Parts Meet Traffic](https://lukyday.hashnode.dev/network-part-5-cdn-websocket-and-idempotency-when-the-parts-meet-traffic?utm_source=hashnode&utm_medium=feed) Four real scenarios — image loading, real-time chat, global routing, and payment retries — where Parts 1–4 stop being theory and start being architecture decisions. 14 min read · [lukyday.hashnode.dev](https://lukyday.hashnode.dev/network-part-5-cdn-websocket-and-idempotency-when-the-parts-meet-traffic?utm_source=hashnode&utm_medium=feed) [Patrick Kearns](https://hashnode.com/@fullstackcity) · [May 4](https://hashnode.com/posts/add-idempotency-to-a-distributed-net-system-without-mediatr/69f896bc46610fd606e1d454) ### [Add Idempotency to a Distributed .NET System Without MediatR](https://dotnetdigest.com/add-idempotency-to-a-distributed-net-system-without-mediatr?utm_source=hashnode&utm_medium=feed) Add Idempotency to a Distributed .NET System Without MediatR 22 min read · [dotnetdigest.com](https://dotnetdigest.com/add-idempotency-to-a-distributed-net-system-without-mediatr?utm_source=hashnode&utm_medium=feed) [Nguyễn Việt Tùng](https://hashnode.com/@nvtung) · [Feb 1](https://hashnode.com/posts/idempotency-the-most-important-word-in-cron-youre-probably-ignoring/697ed41b0625797399239ef0) ### [Idempotency: The Most Important Word in Cron You’re Probably Ignoring](https://devpath-traveler.nguyenviettung.id.vn/idempotency-the-most-important-word-in-cron-youre-probably-ignoring?utm_source=hashnode&utm_medium=feed) How to design cron jobs that survive retries, overlaps, and partial failures 6 min read · [devpath-traveler.nguyenviettung.id.vn](https://devpath-traveler.nguyenviettung.id.vn/idempotency-the-most-important-word-in-cron-youre-probably-ignoring?utm_source=hashnode&utm_medium=feed) [Surya Sathi](https://hashnode.com/@surya-sathi) · [Jan 26](https://hashnode.com/posts/idempotency/697709f61c5ccfad21f2f449) ### [Idempotency](https://systems-notes.hashnode.dev/idempotency?utm_source=hashnode&utm_medium=feed) Making Systems Correct Under Retries and Concurrency 10 min read · [systems-notes.hashnode.dev](https://systems-notes.hashnode.dev/idempotency?utm_source=hashnode&utm_medium=feed) [Nguyễn Việt Tùng](https://hashnode.com/@nvtung) · [Jan 17](https://hashnode.com/posts/anatomy-of-a-cron-job/696b76dbde173f13523aaf7c) ### [Anatomy of a Cron Job](https://devpath-traveler.nguyenviettung.id.vn/anatomy-of-a-cron-job?utm_source=hashnode&utm_medium=feed) How cron jobs actually run—and why production behaves nothing like your local machine 7 min read · [devpath-traveler.nguyenviettung.id.vn](https://devpath-traveler.nguyenviettung.id.vn/anatomy-of-a-cron-job?utm_source=hashnode&utm_medium=feed) [Ankan Saha](https://hashnode.com/@theankansaha) · [Jan 11](https://hashnode.com/posts/learning-reliable-system-design-from-a-tiny-api-glitch/696433c99943b8836613e32b) ### [Learning Reliable System Design from a Tiny API Glitch](https://blog.ankan.in/learning-reliable-system-design-from-a-tiny-api-glitch?utm_source=hashnode&utm_medium=feed) Idempotency prevents duplicate records and enhances system reliability in backend API design. Explore solutions in this insightful article 3 min read · [blog.ankan.in](https://blog.ankan.in/learning-reliable-system-design-from-a-tiny-api-glitch?utm_source=hashnode&utm_medium=feed)