一种面向网格计算的自适应动态冗余预留策略

发布时间：2018-11-04 11:53

【摘要】：针对网格环境中冗余机制在系统可靠性和任务执行效率之间难以平衡的问题,提出一种冗余度可动态调整的自适应冗余策略.该策略以可靠性指标为约束条件,依据负载变化自适应地优化系统冗余度,在不降低可靠性的前提下减少冗余度过高对网格任务执行效率的负面影响.理论分析给出了冗余度与可靠性之间的量化关系,实验分析对比了该动态冗余策略与其他冗余策略的性能差异,并对策略关键参数进行了对比分析.实验结果显示,当系统面临较高的任务负载或负载变化剧烈时,自适应的动态冗余预留策略能够显著提高资源有效利用率,并在任务执行效率和系统可靠性之间实现动态平衡,从而降低传统冗余策略对系统性能的负面影响.
[Abstract]:Aiming at the difficulty of balancing redundancy mechanism between system reliability and task execution efficiency in grid environment, an adaptive redundancy strategy with dynamically adjustable redundancy is proposed. This strategy adaptively optimizes the system redundancy based on the load variation with the reliability index as the constraint condition and reduces the negative effect of the high redundancy on the grid task execution efficiency without reducing the reliability. The quantitative relationship between redundancy and reliability is given through theoretical analysis. The performance differences between the dynamic redundancy strategy and other redundant strategies are analyzed experimentally and the key parameters of the strategy are compared and analyzed. The experimental results show that the adaptive dynamic redundancy reservation strategy can significantly improve the effective utilization of resources and achieve a dynamic balance between task execution efficiency and system reliability when the system is faced with a high task load or a severe load change. In order to reduce the negative impact of traditional redundancy strategy on system performance.
【作者单位】：湖南工程学院计算机与通信系;中南大学信息科学与工程学院;
【基金】：国家自然科学基金项目(60673165,60970038,61272148) 湖南省科技计划项目(2012GK3075)
【分类号】：TP393.09

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