A Load Balancer is used to distribute traffic across multiple servers 🌐
In simple words
A load balancer makes sure
no single server gets overloaded 🧠
Without a load balancer ❌
• One server handles all traffic
• App becomes slow
• Server can crash
🧠 What a Load Balancer Does
• Distributes incoming requests ⚖️
• Improves performance ⚡
• Increases reliability 🔒
• Prevents server overload 🚫
🌍 Real World Examples
• Large websites like e commerce apps
• Banking and payment platforms
• Streaming services
• High traffic APIs
🔄 How Load Balancing Works
User sends request 📤
Load balancer receives it ⚖️
Request is forwarded to a healthy server 🖥️
Response is sent back to user 📩
🧰 Common Load Balancing Algorithms
• Round Robin 🔄
• Least Connections 📉
• IP Hashing 🧮
💻 Example: Nginx Load Balancer Config
upstream backend {
server server1.example.com;
server server2.example.com;
}
server {
location / {
proxy_pass http://backend;
}
}