空间信息网格服务工作流模型及其应用  

Spatial Information Grid Service Workflow Model and Its Application

作　　者：万林[1,2] 谢忠[1,2] 吴信才[1,2] 

机构地区：[1]中国地质大学信息工程学院,湖北武汉430074 [2]地理信息系统软件及其应用教育部工程中心,湖北武汉430074

出　　处：《地球科学（中国地质大学学报）》2013年第S1期174-182,共9页Earth Science-Journal of China University of Geosciences

基　　金：国家"十二五"科技支撑计划重点项目课题(No.2011BAH06B04);国家自然科学基金(No.41201474);中央高校基本科研业务费专项资金(No.CUG120835)

摘　　要：现有的空间信息网格应用系统缺乏对计算资源的有效组织及管理方法,无法满足复杂空间业务流程化建模及计算任务协同化处理的需求.从数据与功能相互分离的GIS软件架构角度出发,采用活动网络图的方法提出了一种以服务功能建模为基础的新型空间信息服务工作流模型,该模型通过服务功能的组装拆卸及动态聚合能够实现空间信息服务资源的灵活构建及动态迁移,较好地解决了网格环境下空间计算资源的统一组织与按需分配、计算任务的并行化处理等问题.在此基础上,建立了空间信息网格工作流集群的总体框架并讨论了系统的自动负载均衡及流程资源的动态调度机制.研究成果成功地应用于地质调查信息网格环境下的矿产资源储量测算系统,实现了网格环境下复杂空间应用的工作流处理模式,并有效地提高了业务系统的处理效率.Most of existing spatial information grid systems can not meet the demands of complex spatial business process modeling and cooperative process of computing tasks for lack of effective organization and management of computing resources.Based on the GIS architecture with data/function separation,we put forward a novel spatial information grid service workflow model based on service function composition using activity network graph method.This model provides a flexible construction mechanism to build different spatial information services and achieves dynamic migration of these service resources using assembly and disassembly,dynamic aggregation mechanisms of service functions.It offers a solution for the challenges of unified organization of computing resources,resource distributions according to need and parallel task processing in grid environment.Based on the model,the overall framework of spatial information grid workflow cluster is proposed,which is featured with automatic load balance and dynamic resource allocation.The research results mentioned above have been successfully applied to metallogenic prediction in China geological survey information grid.It realizes a workflow-based processing mode for complex spatial information applications and greatly improves the processing efficiency of spatial information system in a grid environment.

关 键 词：空间信息网格 网络地理信息系统 工作流 服务合成 服务迁移 功能仓库 

分 类 号：TP393.01[自动化与计算机技术—计算机应用技术]