Journal of Computer Applications

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Services selection based on commodity-market in grid workflow

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  • Received:2007-06-19 Revised:1900-01-01 Online:2007-12-01 Published:2007-12-01
  • Contact: Wan-Cheng NI

网格工作流中基于商品市场的服务选择

倪晚成 刘连臣 吴澄   

  1. 清华大学国家CIMS工程技术研究中心 清华大学国家CIMS工程技术研究中心 清华大学国家CIMS工程技术研究中心
  • 通讯作者: 倪晚成

Abstract: Services selection is important in Grid workflow. To deal with the inefficient resources utilization brought by greedy competition for QoS in current Web services composition methods, an "on-demand" Grid services selection method based on commodity market was put forward. Based on global evaluation model for Grid workflow, services selection was modeled as a 0-1 multi-dimensional knapsack problem by transforming the service requester's requirements into constraints. Furthermore, the selection model was improved with economic "price-demand relationship". Finally, experiments show that the proposed services selection method can bring load balance, which is helpful to the utilization of Grid resources.

Key words: services selection, commodity-market, grid workflow, 0-1 multi-dimensional knapsack problem

摘要: 服务选择是网格工作流的重要环节。针对现有Web服务组合方法对服务质量(QoS)贪婪索取而不利于网格资源有效利用的问题,提出基于商品市场的"按需"网格服务选择方法:根据面向工作流全局的评价模型,以服务使用者需求为约束条件,将服务选择建模为0-1多维背包问题;并引入经济学中的"价格-供需关系"改进了服务选择模型。仿真实验表明:基于商品市场的服务选择均衡了系统负载,有利于网格资源的高效利用。

关键词: 服务选择, 商品市场, 网格工作流, 0-1多维背包问题