【摘要】 网格环境中,由于网格服务频繁加入、修改、撤销,使得动态网格服务发现成为一个困难问题。给出一个适用于服务动态发现的二维模型以及基于其上的服务注册、刷新和删除协议,并据此提出动态服务发现算法。算法采取局部集中式和全局分布式服务组织管理与发现机制,将服务功能与服务属性分开匹配,以适应频繁加入、撤出及注册信息刷新的动态服务发现。仿真结果从底层地理区域数目、网格规模、网络繁忙程度、网络动态程度等方面验证了模型与算法的优点及有效性。更多还原

【Abstract】 Services join in and withdrawal from the grid frequently,this makes dynamic grid service discovery a difficult issue.This paper presented a two-dimensional model for dynamic service discovery.Based this model,the service’s re-gistration,refreshing,cancellation protocols and discovery algorithm were described.A partial centralized and global distributed service management and discovery mechanism was applied in the model,parting function and property matching on different nodes,boosting the holistic performance of dynamic grid service discovery.The simulation results show the model is working well in performance of dynamic grid service discovery according to such indexes as the scale of grid,the busy degree of grid,dynamic degree of grid,the partition granularity of grid.更多还原