Load Balancing: Algorithms, Consistent Hashing, and the Sticky Session Problem
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This piece provides a comprehensive breakdown of modern load-balancing algorithms, explaining why basic round-robin routing falls short in production systems and detailing alternatives such as weighted algorithms, sticky sessions, and consistent hashing for dynamic cluster environments. Mastering traffic distribution patterns is an essential capability for systems architecture. Relying on round-robin routing causes issues when nodes become heterogeneous or stateful requests require predictable handling. Learning how consistent hashing minimizes cache invalidation and re-sharding overhead during dynamic scaling equips you to design fault-tolerant backend systems that handle dynamic traffic gracefully.