网格计算和信息共享

从网格技术提出的背景和其优越性出发,分析其协议体系结构及其各个协议之间的关系.详细介绍目前最为流行的开放网格服务体系结构OGSA的实现环境和接口机制,并且以一个基于OGSA的数据挖掘应用例子说明在多级虚拟网络运行环境下,网格服务是如何解决在从多个信息源集成信息过程中的远程接口激活,生命周期管理,通知和授权等功能的实现问题.这也是广域网环境下大型分布式系统中普遍存在的技术难点.

Technology of grid computing and information sharing

From the background and advantage of computational grids, it was analyzed the grid protocol architecture and thecorrelation between the protocols. It was also introduced the implementation and interface mechanism of the most prevalenceOpen Grid Services Architecture(OGSA). Though a data mining example based on OGSA, it was illustrated how the grid servicesintegrate the information from heterogenous information sources, achieved such functions as: remote interface invoking,lifetime management, notification and authorization under the environment of muti-level Virtual Organization(VO). Thesewere also the difficulties which were ubiquitous in the large distributed system of WAN environment.