Top 8 Load Balancer Algorithms Explained, Including Round Robin and Least Connections

A DEV Community guide walks through eight load balancer algorithms with interactive demos that show which server receives each next request. It starts with round robin, which cycles through a fixed server list in order without checking how busy each machine is. The author notes that this suits equal machines with similar request costs, but can overload one server when a single heavy upload stays put while cheap health checks rotate past it. The article then covers weighted variants and least connections, which sends traffic to the server with the fewest open requests. It also explains how Application Load Balancers and HAProxy implement these approaches, including response-time-based selection.
This is an AI-generated summary. ShortSingh links to the original source for the complete article.


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