Scaling WebSockets with Redis

Scaling WebSockets with Redis

Utkarsh Srivastava's photo
Utkarsh Srivastava
·

1 min read

Scaling WebSockets with Redis for Real-Time Communication

Building a scalable WebSocket architecture requires handling multiple servers while ensuring seamless communication between clients. This diagram illustrates how Redis Pub/Sub can be used as an adapter to synchronize socket events across multiple WebSocket servers.

How It Works?

  • Clients connect to different WebSocket servers (Server 1 & Server 2).

  • Each server manages its own WebSocket connections (Sockets A-F).

  • Redis acts as a central hub, ensuring messages are delivered across all servers.

  • This setup enables scalability and high availability, allowing clients connected to different servers to interact in real-time.

Why Use Redis Adapter?

  • Ensures real-time event propagation across multiple instances.

  • Solves the problem of maintaining state in distributed WebSocket environments.

  • Improves scalability by enabling horizontal scaling of WebSocket servers.

This architecture is widely used in chat applications, collaborative tools, live dashboards, and real-time notifications.

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