共查询到19条相似文献,搜索用时 78 毫秒
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基于有向无环图的两层网格监测系统 总被引:14,自引:1,他引:14
资源监测系统是网格实现中的重要一环,Global Grid Forum已提出用网格监测体系结构(grid monitoring architecture,GMA)来解决这些问题,在此基础上,提出一种基于有向无环图的两层资源监测系统(DTGMS)。该系统使用有向无环图来描述资源间的依赖关系,把它作为该系统的逻辑基础,总体结构分为维护层和工作层同,维护层存储管理监测元数据和控制工作层的运行,工作层依据维护层提供的元数据,负责实际的数据采集、处理、输出等与被监测动态数据直接相关的工作。工作层的监测代理实现为控制核心和扩展模块两部分,有利于实现功能动态扩展。还比较详细地介绍了系统各模块间的交互协议与通信优化。征收GMA相比,新系统更好地满足了网格监测的需求,以较低的系统开销获得较多的功能。 相似文献
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一个科学计算服务网格应用系统的设计与实现 总被引:2,自引:0,他引:2
为扩大计算能力的共享规模,并充分复用已有的计算程序.提出了一个SCS服务的概念.一个SCS服务把一个科学计算程序和它的宿主环境(计算节点)结合起来,构成了一个提供科学计算服务的基本单元.设计了一个网格应用系统(PCG系统)来管理SCS服务.PCG系统是一个3层的架构,顶部是一个Web门户,中间是SCS服务管理器,网格中间件系统位于后端.SCS服务管理器是整个系统的核心部分,包含了四个模块:通讯模块(comm)、需求转换模块(User Requirements Translator)、服务信息查询协商模块(Service Query&Broker)和服务提交管理模块(Service Handler).基于GlobusToolkit作为中间件,PCG系统已经在北京大学校园网内跨越多个局域网进行了实现.在PCG系统上.已经成功地运行了若干个实际科学计算的实例. 相似文献
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随着网格技术的不断发展,应用到网格上的应用程序越来越多。网格环境是一个分布式异构的计算环境,为了更有效地利用网格资源和提高程序运行效率,可以结合网格特点采用应用程序分解技术来达到目的。本文通过对应用程序类型以及一个分解实例的分析,得出这样的结论:对于适合分解的应用程序,采用分解技术可以提高应用程序的执行效率。 相似文献
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网格资源管理中的市场性能监测 总被引:1,自引:0,他引:1
针对网格计算经济中的市场模型,实现了资源调度市场的状态数据监测。提出的市场监测指标体系主要包括运行效率(交易达成速度、系统效率、负载平衡、调度失败率和资源利用率)、价格稳定性评估和风险评估(违约率和欺诈)。针对上述评价模型,设计了监测的体系结构;通过仿真实验,验证了模型和体系结构的正确性。 相似文献
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针对气象信息的特点,利用GPS、RS获取地理数据,利用GIS的分析功能,使空间信息与属性信息无缝集成,将传统关系型数据库所表现的气象信息建立成以Geodatabase为中间件的气象信息库。采用空间数据引擎,利用数据处理后的图形信息直观显示气象台、气象站、测控船收集的气象信息情况。同时,利用网络环境下多台计算机处理能力的集成计算网格来完成地理信息海量数据的并行计算,从而快速、动态地提供全球气象信息服务,并以空间的三维形式进行直观显示。该模型成功的应用在921载人航天工程的水文气象系统中负责数据显示处理工作,为管理者对信息的动态掌握提供了决策支持信息。 相似文献
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本文提出了网格环境下的并行计算模型G-PRAM,并在此基础上提出网格资源树遍历的一种并行实现算法,最后给出示例和说明。 相似文献
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We present the latest instantiation of GridSAT [1], a distributed and complete satisfiability solver that is explicitly designed to aggregate Grid resources for application performance. GridSAT was previously shown to outperform the state-of-the-art sequential solvers. In this work, we explore the unprecedented solving power GridSAT enables through algorithmic and implementation innovations. We describe the implementation techniques that allow GridSAT to leverage a variety of high-end batch-scheduled resources, clusters, interactive workstations, and personal computing resources through autonomous scheduling, checkpoint scheduling, and work migration. These innovations have allowed GridSAT to solve a set of ‘hard’ and previously unsolved industrial and community satisfiability problems. In addition to this new solution power, GridSAT also outperforms the otherwise highest performance general solvers on the annual SAT competition [21] performance benchmarks.This work was supported by grants from the National Science Foundation, numbered CAREER-0093166, EIA-9975020, ACI-0103759, and CCR-0331654 and by the San Diego Supercomputer Center and the TeraGrid project. 相似文献
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在分析几个代表性实现系统的基础上,给出了一种侧重于计算任务调度的网格计算底层支撑系统的实现模型(SE-Model),在对该模型进行分析之后,又进一步指出了当前网格计算研究中存在的问题和未来的发展趋势。 相似文献
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贾玉罡 《数字社区&智能家居》2007,(9):1236-1237
网格计算是一种新型的分布计算技术。文章介绍了网格系统的概念、特点、功能,阐述了网格的体系结构。并对网格计算技术的应用前景作了分析。 相似文献
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Antonio J. Nebro Enrique Alba Francisco Luna 《Soft Computing - A Fusion of Foundations, Methodologies and Applications》2007,11(6):531-540
This paper analyzes some technical and practical issues concerning the use of parallel systems to solve multi-objective optimization
problems using enumerative search. This technique constitutes a conceptually simple search strategy, and it is based on evaluating
each possible solution from a given finite search space. The results obtained by enumeration are impractical for most computer
platforms and researchers, but they exhibit a great interest because they can be used to be compared against the values obtained
by stochastic techniques. We analyze here the use of a grid computing system to cope with the limits of enumerative search.
After evaluating the performance of the sequential algorithm, we present, first, a parallel algorithm targeted to multiprocessor
systems. Then, we design a distributed version prepared to be executed on a federation of geographically distributed computers
known as a computational grid. Our conclusion is that this kind of systems can provide to the community with a large and precise set of Pareto fronts that
would be otherwise unknown. 相似文献
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While existing work concentrates on developing QoS models of business workflows and Web services, few tools have been developed
to support the monitoring and performance analysis of scientific workflows in Grids. This paper describes novel Grid services
for dynamic instrumentation of Grid-based applications, performance monitoring and analysis of Grid scientific workflows.
We describe a Grid dynamic instrumentation service that provides a widely accessible interface for other services and users
to conduct the dynamic instrumentation of Grid applications during the runtime. We introduce a Grid performance analysis service
for Grid scientific workflows. The analysis service utilizes various types of data including workflow graphs, monitoring data
of resources, execution status of activities, and performance measurements obtained from the dynamic instrumentation of invoked
applications, and provides a rich set of functionalities and features to support the online monitoring and performance analysis
of scientific workflows. Workflows and their relevant information including performance metrics are stored and utilized for
comparing the performance of constructs of different workflows and for supporting multi-workflow analysis.
The work described in this paper is supported in part by the Austrian Science Fund as part of the Aurora Project under contract
SFBF1104 and by the European Union through the IST-2002-511385 project K-WfGrid. 相似文献
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