# Horizontal vs Vertical Scaling

Horizontal scaling is the process of adding more machines to your system. This is also known as scaling out. Vertical scaling is the process of adding more power to a single machine. This is also known as scaling up.

Visit the following resources to learn more:

- [@article@Scaling Horizontally vs. Scaling Vertically](https://www.digitalocean.com/resources/article/horizontal-scaling-vs-vertical-scaling)
- [@video@System Design Basics: Horizontal vs. Vertical Scaling](https://www.youtube.com/watch?v=xpDnVSmNFX0)
- [@video@Vertical vs. Horizontal Scaling for Database Servers](https://www.youtube.com/watch?v=R99R-SNbo9g)