What is difference between Scale In & Scale Out?

Question

Chitra S · Accepted Answer

In Azure, scale out (horizontal scaling) adds more instances (VMs, containers) to handle increased load, while scale in removes them when demand drops, using services like VM Scale Sets or App Service's instance count; scale up (vertical scaling) increases resources (CPU, RAM) on a single instance by changing its pricing tier, and scale down reduces them, offering flexibility for performance and cost optimization.

What is difference between Scale In & Scale Out?

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