Load Balancing and Service Discovery
Understand how SaaS backends distribute traffic across many instances using load balancers, health checks, and service discovery.
The Need for Load Balancing
When one server cannot handle all traffic, you run many copies. A load balancer sits in front and spreads incoming requests across these instances.
This is the backbone of horizontal scaling for SaaS backends.
How a Load Balancer Works
Clients connect to a single address. The load balancer accepts the request and forwards it to one of the backend servers, then relays the response back.
To the client, the cluster looks like one powerful server.
All lessons in this course
- Horizontal Scaling Techniques
- Message Queues & Event-Driven
- Serverless Architecture Basics
- Load Balancing and Service Discovery