Socket.IO Adapters: Scaling Beyond One Server
Socket.IO adapters let you scale beyond one server. They use a backend like Redis Pub/Sub to broadcast messages across all your instances, so a user on Server A gets events from Server B. The footgun is assuming this handles everything; you still need a load.
A single Socket.IO server is a bottleneck. Adapters solve this by using a message bus like Redis Pub/Sub to synchronize broadcasts across multiple server instances. This ensures all clients in a room receive messages, regardless of which server they're connected to. This is essential for any production app running on more than one process. The footgun is using the base `redis` package, which has reconnection bugs; use `ioredis` instead. Also, the Redis adapter doesn't support connection state recovery.
Read the original → socket.io
- #socket.io
- #nodejs
- #scaling
- #redis
- #websockets
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