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What Is Scalability?

Explore the fundamentals of scalability in cloud environments focusing on how applications adapt to increasing demand. Understand vertical and horizontal scaling, their limitations, and examples like Stack Overflow and WordPress. This lesson helps you grasp critical strategies for building scalable cloud applications using AWS.

Scalability

AWS defines scalability as follows in its well-architected framework: “Successful, growing, systems often see an increase in demand over time. A system that is scalable can adapt to meet this new level of demand.” 3^3

The core takeaway here is that scalability allows our systems to adapt to demand. However, we only need scalability if our system needs to grow. This could be due to an increase in demand. This is probably the ...