文章基本信息

标题：Using Slack Reservation Strategy to Improve User QoS in Computational Grids
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作者：Peng Xiao ; Ning Han
期刊名称：International Journal of Grid and Distributed Computing
印刷版ISSN：2005-4262
出版年度：2012
卷号：5
期号：4
出版社：SERSC
摘要：Advance reservation is an effective technique to realize end-to-end quality of service (QoS) guarantees for grid applications. However, excessive advance reservation will result in low resource utilization and high rejection rate on receiving new requests, which in turn reduces user's QoS satisfaction. In this paper, a slack reservation strategy is proposed, with aiming to mitigate the negative effects brought about by conventional reservation service. The strategy is based on the observation that applications tend to overestimate reservation deadline to ensure their completion. It allows accepting new reservation requests that overlapping with existing ones under certain conditions. Both the benefits and risks of the proposed policy are presented theoretically. Experimental results show that the strategy can bring about remarkably higher resource utilization and lower rejection rate when the system is in presence of heavy reservation workload.
关键词：Grid Computing; Quality of Service; Reservation Violation; Task Scheduling