What is the problem here? #java #systemdesign #coding
Mar 7, 2026•Channel
AI Analysis
Data from YouTube Data API v3•Updated Just now
Video Overview
Video Details
Published3 months ago
Duration0:09
Video IDp43JWVty674
Languageen
CategoryEducation
PrivacyPublic
Made for KidsNo
Video TypeYouTube Short
Performance Metrics
Views2.1K
Likes28
Comments2
Engagement Rate1.40%
Likes per 100 views1.30
Comments per 1K views0.93
Description
A single server can't hold 1M WebSocket connections. With multiple servers, user A on Server 1 can't directly message user B on Server
2. Use a pub/sub system like Redis Pub/Sub — when Server 1 gets a message for user B, it publishes to a channel that Server 2 subscribes to. Horizontal scaling requires coordination.
#programming #coding #developer #tech #softwareengineering