Title: Improving user QoS by relaxing resource reservation policy in high-performance grid environments
Authors: Peng Xiao; Ning Han
Addresses: School of Computer and Communication, Hunan Institute of Engineering, Xiangtan 411104, China ' School of Computer and Communication, Hunan Institute of Engineering, Xiangtan 411104, China
Abstract: Advance reservation is to provide end-to-end quality-of-service (QoS). However, excessively using advance reservation will lead to lower utilisation and higher rejection. To mitigate the negative effects of advance reservation, a temporal-spatial relaxing technique is proposed in this paper. It is based on an observation that applications tend to overestimate their reservation durations. The proposed technique is completely compatible with the classical reservation mechanism, which means it can be conveniently applied in most practical systems. The experimental results show that the relaxed reservation technique can achieve higher resource utilisation and lower rejection rate comparing with other techniques. Also, it shows better robustness when the grid systems is in the presence of high rate of reservation requests.
Keywords: grid computing; co-reservation; quality of service; QoS; reservation contract; backfilling; resource reservation policy; high performance computing.
International Journal of Grid and Utility Computing, 2013 Vol.4 No.4, pp.255 - 264
Received: 14 Oct 2012
Accepted: 19 Dec 2012
Published online: 12 Oct 2013 *