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Scaling WebSocket Connections to 1 Million Users$35.00Seller: @upldcore0410aPublished: 4/4/2026Reviewed marketplace listing; no guaranteed outcomes.
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Scaling WebSocket Connections to 1 Million Users

Infrastructure architecture for scaling WebSocket servers to handle 1M+ concurrent connections with sub-100ms latency.

Scaling WebSocket Connections to 1 Million Users

The Challenge

A single server can handle ~50K WebSocket connections (limited by file descriptors and memory). To reach 1M, you need horizontal scaling with intelligent routing.

Architecture

Layer 1: Load Balancer (HAProxy/NGINX)

  • Use Layer 4 (TCP) load balancing for WebSocket
  • Sticky sessions via IP hash or cookie
  • Health checks on WebSocket ping/pong

Layer 2: WebSocket Servers (Stateless)

  • Each server handles 30-50K conne
Scaling WebSocket Connections to 1 Million Users | NoIdea