摘要： 由于计算资源具有广域分布、异构、动态等特点，使得计算网格环境下资源管理和调度成为一个非常复杂且具有挑战性的问题。分布式系统的性能度量、分析及预报已变得日益重要，而精确预报任务的运行时间，对达到应用性能是至关重要的。该文描述了一个基于负载的任务运行时间预报系统模型，它是任务调度及资源分配算法的中心。

关键词: 任务运行时间预报；性能预报；任务调度；计算网格

Abstract: The management of resources and scheduling computations in a grid environment is a complex and challenge undertaking, mainly due to resource’s geographic distribution, heterogeneity, dynamic, distributed ownership with different policies and priorities, varying loads, reliability, and availability conditions. Performance measurement, analysis and prediction of distributed systems have become increasingly important, especially, accurately prediction task runtime in order to achieve application performance. This paper presents a load-based task runtime prediction model which is the centre of any scheduling and resource allocation algorithm

Key words: Task runtime prediction; Performance prediction; Task scheduling; Computational grid