Scalable Chat System: WebSockets and Redis Pub/Sub

System Design diagram · made in Skemio

Architecture diagram illustrating chat users on separate WebSocket servers exchanging real-time messages via Redis Pub/Sub and async DB persistence.

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What it shows

Stateful WebSocket servers maintain open duplex channels with clients.
Redis Pub/Sub channels dynamically route chat payloads between servers.
NoSQL column databases persist high-volume conversation logs asynchronously.

The takeaway

Decouple WebSocket connection state from message routing using distributed pub/sub.

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#RedisPubSub
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#ScalableArchitecture

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