Referred to as “scale-out”, allows you to scale by adding more servers into your pool of resources.
- Horizontal scaling is desirable for large scale applications due to the limitations of vertical scaling.
- If a web server is offline, another server in the pool can serve requests.
- If many users access the server simultaneously and it reaches the server’s load limit, users experience slower response or fail to connect to the server. Load Balancing is the best technique to address these problems.