Title: The delay time-based server selection algorithm for energy-efficient redundant execution of processes
Authors: Tomoya Enokido; Dilawaer Duolikun; Makoto Takizawa
Addresses: Faculty of Business Administration, Rissho University, Tokyo, Japan ' Department of Advanced Sciences, Faculty of Science and Engineering, Hosei University, Tokyo, Japan ' Department of Advanced Sciences, Faculty of Science and Engineering, Hosei University, Tokyo, Japan
Abstract: It is critical to discuss how to realise not only fault-tolerant but also energy-efficient server cluster systems. In this paper, we propose the redundant delay time based (RDTB) algorithm to select multiple servers for redundantly and energy-efficiently performing application processes. In the RDTB algorithm, it is not necessary to collect a state of every replica to estimate the energy consumption of servers. We evaluate the RDTB algorithm compared with the basic round-robin (RR) and redundant power consumption laxity-based (RPCLB) algorithms. From the evaluation, the total energy consumption of homogeneous and heterogeneous clusters in the RDTB algorithm can be maximally reduced to 36% and 19% of the RR algorithm, respectively. The number of messages exchanged between a load balancer and servers in the RDTB algorithm can be maximally reduced to 90% of the RPCLB algorithm. Therefore, the RDTB algorithm is more useful than the RR and RPCLB algorithms for real environment.
Keywords: energy efficiency; server clusters; fault tolerance; energy consumption models; redundant delay time-based algorithm; green IT; multi server selection.
International Journal of Communication Networks and Distributed Systems, 2015 Vol.15 No.4, pp.366 - 385
Received: 18 Feb 2015
Accepted: 20 Apr 2015
Published online: 12 Oct 2015 *