What is Scalability?
Your application's ability to handle growth in users, data, or traffic
Why It Matters
Scalable systems grow smoothly without needing complete rebuilds as you succeed
Real-World Example
A system that handles 100 users today should scale to handle 100,000 without major changes
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Related Terms
Load Balancer
A system that distributes incoming traffic across multiple servers to prevent any one from being overwhelmed
Horizontal Scaling
Adding more servers to handle increased load
Vertical Scaling
Upgrading a server to be more powerful with more CPU, memory, or storage
Microservices
An architecture where an application is built as many small, independent services that work together
Monolith
An application where all features are built and deployed as a single unit
Static Site
A website with pre-built pages that are the same for every visitor