LOAD BALANCER PATTERN (System Design Pattern)
LOAD BALANCER PATTERN (System Design Pattern)
What is it?
The Load Balancer Pattern is a system design concept where incoming requests from users (clients) are evenly distributed across multiple servers. This ensures better performance, reliability, and scalability.
How It Works:
1. Client:
The user sends a request (e.g., opening a website). This request doesn't go directly to a server—it first goes to the Load Balancer.
2. Load Balancer:
The load balancer checks which server is the least busy and forwards the request there.
➤ Distributes traffic smartly
➤ Avoids overloading any single server
➤ Ensures faster and smoother response
3. Servers:
Multiple servers are available to handle requests. Whichever one the Load Balancer selects will process the request and send back the response to the client.
Why Use It?
✅ Balances traffic efficiently
✅ Increases speed and reliability
✅ Easy to scale (add more servers as needed)
✅ Prevents system crash even if one server goes down
A Load Balancer acts like a "traffic controller"—it directs each request to the best available server, avoiding traffic jams and delays.
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