): The target value (e.g., a 95% cache hit rate or 200ms latency). Controller (
The controller is the most common algorithm used to close the feedback loop. Feedback Control for Computer Systems [Book] - O'Reilly
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
