As the developing of high - speed network and high performance microprocessor technologies , cluster computing is extended from lan to campus network and even to wan . it has been becoming a highly attractive and challenging platform for distributed parallel computing 随着高速网络技术和高性能微处理器技术的发展，集群计算从局域网扩展到园区网甚至广域网，它正成为一种极具吸引力和挑战性的分布式并行计算平台。
The grid resource management system is the important component in grid computing system . it resembles the traditional resource management systems under distributed computing environment and cluster computing environment , supporting three functions : job management , task schedule and resource management 网格资源管理系统是网格计算系统的重要组成部分,从为用户提供方便、高效的服务的角度来看,它与传统的分布式计算环境或集群计算环境下的资源管理系统类似,应当至少具备三种功能:作业管理、任务调度和资源管理。
The third one provides an interface to manage and query from the parallel virtual machine . the fourth is responsible for establishing the connection in xvm , and the last one will build and store all the messages in xvm . all of these classes cooperate and form a parallel virtual environment that is needed in the cluster computing over heterogeneous operate systems 环境构造类用于构造并行虚拟机器环境并向外部提供编程接口；守护进程类提供通信监听和消息处理的功能；控制台类提供对并行虚拟环境进行配置和查询的接口：通信管理类负责系统中通信连接的建立；消息管理类实现系统中各种消息的构造和存储。
With the increasing requirements for distributed computing , researchers have turned their works from traditional cluster computing to internet - based and web service - enabled heterogeneous computing . in this process many great infrastructures , standards , models , algorithms and middle - ware products have been welling up , such as the ogsa ( open grid service architecture ) , . globus project , condor scheduling systems , and grads systems , etc . grid computing can offer the sharing of heterogeneous resources , maximizing the capacity of them 伴随着对分布式计算需求的增长,国内外网格技术的研究重点从传统的集群计算转向了基于internet和web服务的异构平台计算,在这个过程中,网格技术在基础框架、技术规范、算法模型、项目应用等众多子领域中都取得了非常大的成果,比如基于web服务的ogsa网格基础架构,网格中间件平台globus , condor调度系统,以及grads系统等。
