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针对时间和成本约束的网格资源调度问题,提出一种基于MinCTT算法的时间和成本均衡的网格资源分类优化调度算法.该算法综合考虑任务完成时间和执行成本两个QoS因素,由一个成本比值和时间比值的联合均衡值来综合衡量任务在资源上的完成时间和执行成本开销,根据任务估计平均价格,对资源进行分类调度.实验结果表明,该调度算法具有较好的调度性能,能有效的减少任务总的完成时间和执行成本,均衡因子的改变对该算法的调度性能影响较小,选择合适的均衡因子能实现优的调度. 相似文献
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集中对网格资源管理系统未得到足够关注的问题进行研究,引入了管理域模型,融合了 Web 计算技术、正统的网格计算技术和对等计算技术,提出了一种支持网格计算的资源管理系统模型,满足对商业计算公平性、适应性和标准性三个特性的支持,符合目前网格计算逐渐向商业领域扩展的发展趋势. 相似文献
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资源管理是整个校园网格系统中的关键和基础,通过对各种分布的、异构的资源的统一管理,以此实现对整个网格系统资源的一致访问并且使资源管理模块具有可扩展性.通过对资源的抽象、全局惟一资源ID号的分配和资源目录信息树的建立实现对网格资源的统一管理.孩子兄弟表示法的存储方式,大大节省了目录信息树的存储空间.网格系统中资源的注册和查询是按照IP是否位于同一网段内来实现的,在以后的任务执行中减少了主机之间的通信开销. 相似文献
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基于校园网格系统的资源管理 总被引:8,自引:0,他引:8
资源管理是整个校园网格系统中的关键和基础,通过对各种分布的、异构的资源的统一管理,以此实现对整个网格系统资源的一致访问并且使资源管理模块具有可扩展性。通过对资源的抽象、全局惟一资源ID号的分配和资源目录信息树的建立实现对网格资源的统一管理。孩子兄弟表示法的存储方式,大大节省了目录信息树的存储空间。网格系统中资源的注册和查询是按照IP是否位于同一网段内来实现的,在以后的任务执行中减少了主机之间的通信开销。 相似文献
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基于资源路由器的网格资源管理系统 总被引:1,自引:0,他引:1
论述了实现网格资源管理系统所涉及到的各方面问题。论述的是一种基于资源路由器的网格资源管理系统。介绍了网格资源管理系统的组成及各组成部件的作用及网格资源管理中的3个关键技术,包括资源管理信息库管理、资源描述信息库管理、资源服务的接口设计。 相似文献
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The frequent and volatile unavailability of volunteer-based Grid computing resources challenges Grid schedulers to make effective
job placements. The manner in which host resources become unavailable will have different effects on different jobs, depending
on their runtime and their ability to be checkpointed or replicated. A multi-state availability model can help improve scheduling
performance by capturing the various ways a resource may be available or unavailable to the Grid. This paper uses a multi-state
model and analyzes a machine availability trace in terms of that model. Several prediction techniques then forecast resource
transitions into the model’s states. We analyze the accuracy of our predictors, which outperform existing approaches. We also
propose and study several classes of schedulers that utilize the predictions, and a method for combining scheduling factors.
We characterize the inherent tradeoff between job makespan and the number of evictions due to failure, and demonstrate how
our schedulers can navigate this tradeoff under various scenarios. Lastly, we propose job replication techniques, which our
schedulers utilize to replicate those jobs that are most likely to fail. Our replication strategies outperform others, as
measured by improved makespan and fewer redundant operations. In particular, we define a new metric for replication efficiency,
and demonstrate that our multi-state availability predictor can provide information that allows our schedulers to be more
efficient than others that blindly replicate all jobs or some static percentage of jobs. 相似文献
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Due to the highly dynamic feature, dependable workflow scheduling is critical in the Grid environment. Various scheduling algorithms have been proposed, but seldom consider the resource reliability. Current Grid systems mainly exploit fault tolerance mechanism to guarantee the dependable workflow execution, which, however, wastes system resources. The paper proposes a dependable Grid workflow scheduling system (called DGWS). It introduces a Markov Chain-based resource availability prediction model. Based on the model, a reliability cost driven workflow scheduling algorithm is presented. The performance evaluation results, including the simulation on both parametric randomly generated DAGs and two real scientific workflow applications, demonstrate that compared to present workflow scheduling algorithms, DGWS improves the success ratio of tasks and diminishes the makespan of workflow, so improves the dependability of workflow execution in the dynamic Grid environments. 相似文献
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基于QoS的网格资源管理 总被引:15,自引:0,他引:15
资源管理是网格计算研究领域中的一项重要研究点,目前的研究工作大多致力于解决异构性问题,对于在交付无缝QoS(quality of service)前提下提高资源分配性能方面还缺乏深入的研究.而且,目前对网格QoS的研究集中于将多媒体网络QoS的相关成果融入网格体系架构中以提供对网格QoS的支持,而缺少对网格QoS的特性进行系统化的研究与归纳.为此,提出了网格QoS的层次结构模型,并对其中承上启下的虚拟组织层QoS参数进行了新的分类和测量;然后,利用SNAP(service negotiation and acquisition protocol)协议对基于网格QoS层次结构模型的网格QoS参数的映射转换过程进行了分析;最后,设计了网格资源管理仿真系统,并运用相关的网格QoS的研究改进了现有的Min-Min算法.仿真实验结果表明,基于QoS的网格资源管理可以在满足用户QoS需求下,有效地提高网格资源的利用率和服务请求的成功率. 相似文献
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Economic-based approaches have been found to be effective for distributed resource management in Grid computing. However, deciding which model to use is challenging, because (1) the performance stability of a particular model in a dynamic and distributed environment, is hard to establish (2) the performance objective of the Grid network may be complex, and it is difficult to know which model would best fit such an objective, (3) evidence indicates that no single model can cope with every scenario, and (4) no suitable tools exist to accurately predict and contrast the performances of one model with another model in a particular domain. Understanding the strengths and weaknesses of widely proposed economic models in terms of a range of scenarios is, therefore, crucial. To address this, the authors developed a general evaluation platform suitable for analyzing the performance of different economic models in the Grid. This work identifies domains of strength of individual models and highlights their use in various scenarios of Grid computing. 相似文献
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周琪锋 《数字社区&智能家居》2009,(9)
网格在解决分散式资源共享方面具有广阔的应用前景,使得它成为下一代互联网瞩目的焦点。本文首先对网格中资源管理和调度的现状展开讨论,分析比较当前的几种调度方案,为进一步提出高效完备的资源调度算法作准备。 相似文献
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网格资源管理是网格计算中的重要组成部分和研究难点。本文分析了网格资源管理系统的体系结构模型,提出了基于代理的方法来管理网格资源系统,设计了基于Agent的网格资源管理系统的体系结构和工作流程,并应用该方法分析了资源请求过程的实例。同时,为了适应网格系统的可扩展性,我们应用多代理技术解决了代理之间的相互协作的问题。文中所提出的资源管理方案可为网格资源管理提供一种有效的方法和途径。 相似文献