How Load Balancers Choose Servers | Load Balancing Algorithms Explained

How does a Load Balancer decide which server should handle your request? Does it simply rotate between servers? Or does it intelligently choose the least busy, fastest, or most suitable server? In this video, we'll explore the most important Load Balancing Algorithms used in real-world distributed systems and System Design interviews. Using a real e-commerce flash sale example, you'll understand how different algorithms work, their pros & cons, and where they're used in production. 📚 Topics Covered: ✅ Round Robin ✅ Weighted Round Robin ✅ Least Connections ✅ Weighted Least Connections ✅ IP Hash (Sticky Sessions) ✅ Consistent Hashing ✅ Least Response Time ✅ Random with Two Choices You'll also learn: • Which algorithm is the fastest? • Which algorithm works best for microservices? • Why Redis Cluster and Cassandra use Consistent Hashing • How HAProxy and Envoy choose servers • Which algorithm should you use in different scenarios? 💡 Perfect for: • System Design Interviews • Software Engineers • Backend Developers • Distributed Systems • Cloud Engineers • SDE Interview Preparation 📌 Previous Video: 🎥 Load Balancer Explained from Scratch    • Load Balancer Explained in 10 Minutes | L4...   🚀 Upcoming Videos: ▶ Reverse Proxy Explained ▶ API Gateway Explained ▶ CDN Explained ▶ Caching Explained ▶ Consistent Hashing Deep Dive ▶ Database Replication & Sharding If this video helped you understand Load Balancing Algorithms, consider subscribing! I'm building a complete System Design series—from fundamentals to designing systems like Amazon, Netflix, Uber, and WhatsApp. 👍 Like • 💬 Comment • 🔔 Subscribe #SystemDesign #LoadBalancer #DistributedSystems #BackendEngineering #SoftwareEngineering #Microservices #HAProxy #NGINX #Envoy #AWS #Redis #Cassandra #Scalability #CodingInterview #Tech