网格服务系统组装的研究与应用

随着网格技术广泛应用到各个领域，由功能服务组装复杂应用系统是目前采用网格技术来解决各领域问题的主要方法。本文提出一种多服务组装的层次体系结构HGSDR，在这种体系结构中，网格门户仅仅与用户交互，各功能服务的调度及各服务之间的协同主要由各分布的引擎服务节点来协同控制完成。各引擎服务负责动态发现和选择性能最优的紧邻后续服务节点，协同控制整个系统的执行过程。不仅消除了集中调度的计算瓶颈，同时也提高了系统组装的可靠性和灵活性。

Research on Composition of Grid Service System

With the wide use of grid technology,complicated application systems built by function services are the main grid's solutions to various problems.This paper proposes a multiple-service hierarchical architectureHGSDR,in which the grid portal only interacts with users while the scheduling and coordination of function services are controlled by distributed engine services in different nodes.Engine services dynamically find,select the optimal following service node,and coordinate the process of the system.This architecture not only eliminates the bottleneck of the centralized scheduling but also improves the reliability and the flexibility of composition.