Distributed-Systems

Illustration of a message broker with duplicate messages being filtered by an idempotent consumer.

Why Exactly-Once Delivery Requires Consumer Idempotency

Exactly-once delivery cannot be guaranteed without making consumers idempotent; this article breaks down the technical reasoning and shows how to implement idempotency in real systems.

Illustration of a log file streaming into persistent storage.

Designing Write-Ahead Logs for Zero Data Loss Recovery

A deep dive into WAL design strategies that achieve zero data loss, with practical patterns and validation steps for modern databases.

Diagram of ordered messages flowing through an event bus.

Reliable Message Ordering in Asynchronous Event‑Driven Architectures

Learn practical techniques to maintain correct ordering of events across microservices, from deterministic routing to transactional outbox patterns.

Illustration of multiple Redis nodes forming a quorum for a distributed lock.

Designing High‑Availability Distributed Locks with Redlock and Fencing Tokens

A deep dive into Redlock and fencing tokens, showing why they matter and how to implement them correctly for high‑availability systems.

Diagram showing nodes synchronizing CRDT states in a peer-to-peer network.

Implementing Conflict-Free Replicated Data Types for Eventual Consistency in Distributed Collaborative Systems

A practical guide to building CRDT-powered collaborative applications, covering theory, common data types, implementation patterns, and performance tips.