“…A considerable amount of literature has been published on reducing PUE, focusing on optimizing the DC design and location (Yue et al., 2018), job scheduling of IT facility (Beloglazov & Buyya, 2012; Jing‐Yu et al., 2019), decentralized power allocation schemes (Bistritz et al., 2019; Miller et al., 2015; Zhou & Bambos, 2015), air management systems (Fouladi et al., 2017), cooling systems (Hossain et al., 2017), etc. In recent years, the cross‐layer energy efficiency optimization methods have been studied, which include the cooling optimization via IT scheduling, power distribution optimization via IT scheduling, joint optimization of IT and cooling, and joint optimization of IT and power distribution (Wang et al., 2020). The cross‐layer methods aim at improving the power supply system efficiency with IT load dispatching and the combined efficiency improvement of the IT and cooling systems.…”