Idempotency Keys in Microservices: Making Retries Safe End to End
Learn how to mint, propagate, and enforce idempotency keys across microservices so retries, redeliveries, and timeouts never cause duplicate side effects.
16 min read
Tag
distributed systems
Transactional Outbox Pattern: Reliable Events from PostgreSQL
Solve the dual write problem in PostgreSQL with the transactional outbox pattern: table design, polling and CDC relays, idempotent consumers and ordering.
15 min read
Webhook Delivery Design: Signatures, Retries and Replay Protection
Design webhooks as signed, timestamped, idempotent at-least-once events: HMAC verification, replay windows, retries with backoff, and key rotation.
13 min read
Service Discovery in Microservices: How Load Balancing Really Works
Learn how service discovery and load balancing fit together in microservices: DNS, Kubernetes Services, client-side balancing, proxies, and rollout pitfalls.
13 min read
Dead Letter Queue Guide: Handling Poison Messages Safely
Learn to classify poison messages, cap retries with backoff, capture failure context, and run safe, idempotent DLQ replay with owners and alerts.
16 min read
Structured Logging for Distributed Systems: Schema, IDs and Levels
Learn how to design a shared JSON log schema, propagate correlation IDs across services, set meaningful log levels, and enforce it all as a cross-team contract.
14 min read
Service Discovery in Microservices: DNS, Registries and Kubernetes
Learn how service discovery works with DNS, service registries and Kubernetes Services, and how to choose by staleness, failure and coupling trade-offs.
18 min read
Eventual Consistency in Practice: Guarantees Across Services
Learn which consistency models your services need, how to fix dual writes with outbox and CDC, build read-your-writes, run sagas, and monitor staleness.
14 min read
When to Split a Monolith: Signals, Prerequisites, and Trade-offs
Learn when to split a monolith: how to confirm scaling bottlenecks, team contention, and deploy coupling, what to try first, and how to extract safely.
14 min read
The Transactional Outbox Pattern: Reliable Events from Your Database
Learn how the transactional outbox pattern solves the dual write problem, how to build polling or CDC relays, and how to handle duplicates and ordering.
17 min read
Idempotency in Distributed Systems: Making Retries Safe
Learn how idempotency keys, durable dedup records and atomic state transitions make retries safe when exactly-once delivery is impossible.
14 min read
Circuit Breaker Pattern, Retries and Timeouts as One Failure Budget
Learn how to design timeouts, retries with backoff and the circuit breaker pattern together so services survive partial failure instead of amplifying it.
14 min read