redis

10 articles

Diagram showing multiple server nodes competing for a distributed lock over a shared resource

Distributed Locks: Coordinating Work Across Multiple Nodes

Stop racing conditions in distributed systems: a practical guide to implementing distributed locks with Redis and PostgreSQL advisory locks in Node.js.

Jun 27, 2026·5 min read

Architecture diagram showing WebSocket connections routing through Redis pub/sub to multiple server instances

Tutorials

Building a Real-Time Notification System with WebSockets and Redis

A step-by-step tutorial for building a scalable real-time notification system using WebSockets, Redis pub/sub for multi-server broadcasting, and persistent notification storage with read tracking.

Mar 30, 2025·5 min read

Diagram comparing token bucket, sliding window, and leaky bucket rate limiting algorithms

Backend

Rate Limiting Strategies for APIs: Algorithms and Implementation

A deep dive into rate limiting algorithms including token bucket, sliding window, and leaky bucket with distributed implementations using Redis and practical middleware patterns.

Feb 25, 2025·4 min read

Architecture diagram showing cache layers between application servers and database with invalidation flows

Backend

Distributed Caching Patterns: Consistency, Invalidation, and Failure Modes

Master distributed caching patterns including cache-aside, write-through, read-through, and cache invalidation strategies that handle real-world consistency challenges.

Mar 15, 2023·5 min read

Architecture diagram showing a task queue with producers, Redis broker, and worker consumers

Tutorials

Building a Task Queue From Scratch With Node.js and Redis

Build a production-ready task queue step by step using Node.js and Redis, covering reliable delivery, retries, dead letter queues, and concurrency control.

Dec 28, 2022·5 min read

Architecture diagram showing multiple WebSocket servers connected through a Redis pub/sub layer for message fan-out

Backend

Scaling WebSocket Connections Across Servers

How to scale WebSocket connections beyond a single server — covering sticky sessions, pub/sub fan-out with Redis, connection state management, and handling reconnection gracefully at scale.

Oct 2, 2022·5 min read

Diagram showing token bucket algorithm with tokens being added at a fixed rate and consumed by incoming requests

Tutorials

Building a Rate Limiter From Scratch

A step-by-step tutorial for building rate limiters using the token bucket, sliding window, and fixed window algorithms — with TypeScript implementations, Redis integration, and production deployment patterns.

Sep 16, 2022·4 min read

Redis data structure diagram showing sorted sets, streams, HyperLogLog, and hash operations

Backend

Redis Data Structures Beyond Key-Value

Explore Redis data structures beyond simple strings — sorted sets for leaderboards, streams for event logs, HyperLogLog for cardinality, and bitmaps for feature flags.

Aug 25, 2021·4 min read

Token bucket algorithm visualization showing request flow through rate limiter

Backend

API Rate Limiting Patterns That Scale

Token buckets, sliding windows, and distributed rate limiting — practical patterns to protect your API without degrading the experience for legitimate users.

Mar 7, 2020·3 min read

Layered caching architecture diagram showing browser, CDN, application, and database cache levels

Backend

Caching Strategies for Web Applications

From HTTP headers to Redis patterns, a practical guide to caching layers that reduce latency and database load without serving stale data.

Feb 10, 2020·3 min read

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