计算机应用 ›› 2015, Vol. 35 ›› Issue (6): 1580-1584.DOI: 10.11772/j.issn.1001-9081.2015.06.1580

• 先进计算 • 上一篇    下一篇

云环境下基于聚簇的科学工作流执行优化策略

段菊, 陈旺虎, 王润平, 俞茂义, 王世凯   

  1. 西北师范大学 计算机科学与工程学院, 兰州 730070
  • 收稿日期:2015-01-08 修回日期:2015-03-27 发布日期:2015-06-12
  • 通讯作者: 陈旺虎(1973-),男,甘肃静宁人,副教授,博士,主要研究方向:大数据、云计算;chenwh@nwnu.edu.cn
  • 作者简介:段菊(1989-),女,山东济南人,硕士研究生,主要研究方向:大数据、云计算;王润平(1989-),女,甘肃临夏人,硕士研究生,主要研究方向:云计算、科学工作流;俞茂义(1991-),男,安徽铜陵人,硕士研究生,主要研究方向:软件工程、云计算;王世凯(1989-),男,山东菏泽人,硕士研究生,主要研究方向:大数据、云计算。
  • 基金资助:

    国家自然科学基金资助项目(61462076);甘肃省自然科学基金资助项目(1208RJZA134);甘肃省科技支撑计划项目(1104GKCA023);西北师范大学青年教师科研提升计划项目(NWNU-LKQN-12-30)。

Execution optimization policy of scientific workflow based on cluster aggregation under cloud environment

DUAN Ju, CHEN Wanghu, WANG Runping, YU Maoyi, WANG Shikai   

  1. College of Computer Science and Engineering, Northwest Normal University, Lanzhou Gansu 730070, China
  • Received:2015-01-08 Revised:2015-03-27 Published:2015-06-12

摘要:

基于云环境下的科学工作流,以提高处理机利用率、降低费用为目标,提出了一种基于聚簇的执行优化策略。该策略首先基于合理的任务复制和分簇,以实现关键任务的尽早调度;在此基础上,对任务簇再次进行聚集,以充分利用任务簇中任务间可能的空闲时间。实验表明,该策略能够提高任务的并行度,提前工作流的最早完成时间,并且在提高处理机的利用率和降低科学工作流的执行费用方面有显著效果。

关键词: 云计算, 科学工作流, 任务复制, 聚簇, 任务调度

Abstract:

Focusing on the higher ratio of processor utilization and lower execution cost of a scientific workflow in cloud, a policy of execution optimization based on task cluster aggregation was proposed. First, the tasks were reasonably replicated and aggregated into several clusters. Therefore, the key tasks could be scheduled as early as possible. Then, the task clusters were aggregated again to facilitate the spare time among the tasks in the task cluster. The experimental results show that the proposed policy can improve the parallelism of workflow tasks, advance the earliest finish time of the whole workflow and it has a significant effect in improving the utilization ratio of processors and lowering the cost of workflow execution.

Key words: cloud computing, scientific workflow, task replication, cluster aggregation, task scheduling

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