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Concept guides/Real-time systems/Short polling for presence

System designReal-time systems

Short polling for presence

Easy4 min read

Questions it teaches

Team presence detectionEasy25 min

Related

Real-time systems Messaging and streams Scale and caching Consistency and money

Builds on: Messaging and streams

Designing team chat3 min Real-time personalization4 min

Builds on: Scale and caching

Connection pool proxy3 min Connection pooling proxy (gateway)3 min

Related: Consistency and money

E-commerce inventory (overselling)3 min QR ticketing3 min

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