Building Resilient Real-Time Systems: WebSockets, Redis, and High Availability

Short summary

A technical deep-dive into building resilient real-time systems using WebSockets combined with Redis for state management and message brokering. Covers the core challenges of distributed WebSocket architectures: state management, cross-server broadcasting via Redis Pub/Sub, high availability with seamless failover, and horizontal scalability. Includes architecture diagrams and practical patterns for production deployments.

• •WebSockets provide full-duplex communication but single servers create bottlenecks and single points of failure
• •Redis Pub/Sub enables cross-instance message broadcasting; key-value store enables stateless session failover
• •Redis Streams offer persistent message queues with consumer groups for guaranteed delivery and event sourcing

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