Hosting - Concept
Horizontal scaling
Handling more load by adding more machines or instances
What's it for?
Handles more work by adding extra computers rather than making one computer bigger.
For example…
An online service handles a traffic surge by starting six more application instances rather than making one server much larger.
A container platform scales horizontally from three workers to twelve when queue volume rises.
Think of it like…
Opening more checkout lines in a supermarket so more customers can be served at once