What does scalability testing evaluate?

Scalability testing is specifically focused on determining how well a system can handle increased loads. This means evaluating the system's performance as the demand grows, whether in terms of user requests, data processing, or concurrent transactions. The goal is to understand the limits of the system and identify any breaking points or performance bottlenecks that could hinder efficiency when faced with higher demand. This type of testing helps ensure that a system can expand and accommodate growth, making it a critical aspect of infrastructure planning, especially for applications expected to grow in usage over time.

Other aspects mentioned, such as security vulnerabilities, processing speed, and backup capabilities, are crucial in their own right but fall under different categories of testing. Security testing focuses on identifying flaws that may be exploited, speed or performance testing looks at how quickly data is handled under normal conditions, and backup testing checks the efficacy and reliability of backup processes. Scalability testing specifically narrows in on the system's adaptability to increased demand.