Active Disturbance Rejection Control for Server Storage System Temperature Regulation

Reducing the energy consumption for cooling in servers is a major challenge considering data center energy costs today as the power used to cool the servers has become an increasingly large component of the total power consumption. This paper presents an active disturbance rejection control based decoupling control algorithm for flash storage system in a one-unit server to simultaneously improve fan power consumption efficiency and regulate the server SSDs’ temperature to avoid downgraded performance caused by overheating. In the study, a benchmark system is established based on the Samsung Mission Peak server where the thermal characteristics and existing solutions are both systematically evaluated. Good performance of reducing throttling rate and saving fan power were attained in two case studies involving when the drive-zones are partially idle and when they are fully loaded with significant uncertain workload disturbances.