In short
Distributing incoming requests across multiple server instances so no single instance is overwhelmed — necessary once one server can't handle your traffic alone.
How to learn this
- 1Configure Nginx to load-balance between two local instances of the same app.
- 2Learn the difference between round-robin, least-connections, and IP-hash balancing strategies.
- 3Understand why load balancing requires your app to be stateless (or use sticky sessions) to work correctly.
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