Load Balancing

Summary

In a system-design context: the broader strategy of distributing traffic across multiple servers as a prerequisite for horizontal scaling, plus the algorithms and health-checking involved.

• 1Diagram a load-balanced architecture with 3 backend instances behind one load balancer.
• 2Learn how a load balancer detects and routes around an unhealthy instance.
• 3Understand why load balancers themselves can become a single point of failure without redundancy.