Reliability analysis of CRAC system of a modern Data centre via Kriging algorithm

¹ National University of Sciences and Technology (NUST), Islamabad, Pakistan
² School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, People’s Republic of China
³ Center for System Reliability and Safety, University of Electronic Science and Technology of China, Chengdu, 611731, People’s Republic of China

^* Corresponding author: tayyab.zafar@ceme.nust.edu.pk

Abstract

In the modern era of digital growth, Data centres serve as the important infrastructure of the interconnected global network. The Data centres perform as central hubs where immense volumes of data are processed, stored, and distributed. Reliable performance of data centres and Computer Room Air-Conditioning (CRAC) system is of critical importance, through which optimal environmental conditions are achieved. This paper proposes an interesting approach to evaluate the CRAC system’s ability to function properly under various uncertainties. Heat transfer model is developed using various environmental parameters, data server rack parameters, and evolving capacity of data servers. The uncertainties are modelled as random variables. One of the challenging issues in estimating the reliability of a system under uncertainties is to reduce the computational requirements while maintaining the accuracy. To overcome the issue, Kriging model is developed using adaptive sampling. The proposed approach is compared with the available approaches. The method shows better computational efficiency and accuracy.