Vertical vs Horizontal Scaling in Cloud🔥

Imagine your app is a tea stall during peak office hours. People keep coming, the queue gets longer, and suddenly the stall can't serve fast enough. What do you do?

That’s where scaling comes in.
Vertical Scaling is like hiring a super-fast tea maker for the same stall — you don’t open a new one, you just upgrade the current setup with more power (CPU/RAM).

Horizontal Scaling is like opening 2 more stalls next to the first — dividing the crowd and serving faster without overloading one person.

Vertical scaling is simpler but limited — you can upgrade a server only so much.
Horizontal scaling is more scalable and fault-tolerant — if one server goes down, others continue the service.
In interviews, when asked about scaling, most candidates only mention "adding more machines." Surprise the panel by explaining why vertical scaling eventually hits a wall, and how cloud-native apps are designed horizontally from Day 1 for high availability. That's the real edge!
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Видео Vertical vs Horizontal Scaling in Cloud🔥 канала Professor Oggy