What is the difference between Vertical and Horizontal Scaling?
Gagan Garg
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A previous answer explains the concept pretty well. Still, there is a one important caveat that is worth mentioning. While horizontal scaling is usually preferable across the industry as it offers almost unlimited scaling capabilities, it bears an important limitation that services to-be-scaled should be stateless as sharing state across multiple independent instances would require really complex logic
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Great breakdown of scaling! I often see vertical scaling as the go-to, but your points on horizontal scaling really opened my eyes. It’s fascinating how game servers like those at topgamescould benefit from both approaches. Thanks for sharing this insight!
Vertical vs Horizontal Scaling (Short)
Vertical Scaling (Scale Up): Upgrade a single machine (more CPU/RAM). Easy, limited by hardware.
Horizontal Scaling (Scale Out): Add more machines/servers. Harder, but almost unlimited.
✅ Analogy:
Vertical → make one person stronger
Horizontal → add more people to help