【作者】 武文丽；

【导师】 黄永忠；

【作者基本信息】 解放军信息工程大学 ， 计算机软件与理论， 2007， 硕士

【摘要】 网格环境下,资源和用户按照一定的策略被组织在虚拟组织(VO)中进行管理,资源共享和协同建立在VO基础之上。如何构建和管理虚拟组织,实现符合特定应用需求的资源共享,是网格服务系统必须解决的关键问题之一。本文所讨论的虚拟组织服务子系统(以下简称子系统)是特定网格应用环境下虚拟组织构建与管理的一次具体实践。本文围绕高性能计算环境特点这一中心,通过对具有复杂内联关系的应用环境的抽象描述,将广域环境下实现特定应用目标的异构资源共享问题,转换为VO成员间的资源共享问题;而后,通过VO基本策略定义以及资源共享管理模型构建,加以解决;并以此为依据,遵循层次化、模块化思想对子系统功能进行划分,将其分为四层:门户层、服务层、逻辑功能层和数据持久层。在各层功能模块实现过程中,综合运用基于角色的访问控制模型、O/R映射工具、连通图的基本算法、Axis Handler-Chain、SSL以及RIA等解决管理复杂度简化、Java对象持久化、VO成员身份转换二义性、资源访问控制、子系统内部通信安全以及门户视图开发等问题,最终为网格用户提供统一、友好的系统管理和资源使用方式。最后,利用JMeter对子系统进行并发和压力测试。测试数据表明,子系统性能稳定,具有满足现有应用需求的并发能力。更多还原

【Abstract】 In the Grid environment, resources are collaboratively shared in the form of Virtual Organization (VO), which is a dynamic collection of distributed resources and individuals, defined according to a set of resource sharing rules. How to facilitate the construction of VOs to meet the resource sharing requirement of certain application is the key issue of Grid Service System.The Virtual Organization Subsystem (VOS) discussed in this dissertation is an exploratory practice of VO’s construction and management in High Performance Computing Environment (HPCE). Through abstracting the resource’s heterogeneous features and the complex links that lie in the HPCE’s current resources sharing status, the resource sharing problems in HPCE are transformed into resource sharing among VO members. On this basis, by defining the VO’s basic strategies, a resource management mechanism is created, which consists of virtual organization, management domain, grid services, resource owners. In conformity with the strategies and resource management mechanism, the VOS’ design adopts the modularization pattern and emphasizes the software hierarchy, according to which the VOS is divided into four layers: Portal Layer, Web Service Layer, Logic Function Layer, and Data Persistence Layer. During the implementation, RBAC, Object/Relation Tool, Axis’s Handler-Chain, SSL are used to achieve reliable resources sharing and ensure the security of internal communication, Depth-First Search in the Connected Graph is adopted to avoid the confusion in the course of VO Member’s identity transformation, and in addition the RIA technology is employed to supply a friendly portal for grid users.At the end of the dissertation, the VOS is tested by JMeter.The testing data indicates that the subsystem owns the ability to meet current concurrent accessing demand of HPCE.更多还原