How do balancing servers work?

Question

Highload

If I'm not mistaken in the terminology, of course.
Here is the site's entry point - a proxy that distributes requests to logic servers and returns a response. Correctly?
And if this one such proxy is not enough, then how? Several such servers and some router in front of them?

Answer 1

There are different balancing methods.
1. node with configured HAProxy/Nginx
2. DNS robin round or Amazon Route 53
3. BGP balancing
4. Use iron once or twice
for balancing 5. Your application can handle balancing, for example, if users receive a thin/thick client, it can be the logic for balancing on your cluster is described.
Each method has its own scope, advantages and disadvantages.

Answer 2

dns clustering + entry point + a bunch of servers to which the entry point proxies