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Online Learning

Jan 12, 2026 Recommendation Systems 21 min read

Recommendation Systems (15): Real-Time Recommendation and Online Learning

A practitioner's guide to real-time recommendation: streaming pipelines (Kafka + Flink), online learning (SGD, FTRL, AdaGrad), bandits (UCB, Thompson Sampling, LinUCB), latency budgets, feature freshness, concept drift, …