Reservation, Limit, Share, and Borrowing in Cloud Computing

Cloud platforms use resource control mechanisms to ensure performance, fairness, and cost efficiency. Four key concepts used in cloud resource management are Reservation, Limit, Share, and Borrowing. Reservation guarantees a minimum amount of resources for a workload. Even during peak demand, reserved resources remain available, making reservations ideal for critical or SLA-driven applications. Limit defines the maximum resources a workload can consume. It prevents overuse and unexpected costs by placing a hard cap on resource consumption. Share determines priority when multiple workloads compete for limited resources. Workloads with higher shares receive a larger portion of resources during contention. Borrowing allows workloads to temporarily use unused resources from others. These extra resources are not guaranteed and can be reclaimed when needed elsewhere.