): The algorithm that calculates what change to apply based on the error. Control Input (
): The target value (e.g., a 95% cache hit rate or 200ms latency). Controller ( Feedback Control for Computer Systems
Feedback control for computer systems applies classical control theory—originally used for physical systems like engines—to digital environments like web servers, databases, and caches. It enables systems to self-adjust to maintain performance goals despite unpredictable workloads or resource shifts. ⚙️ Core Concepts of Feedback Control ): The algorithm that calculates what change to