A Concurrent Level Based Scheduling for Workflow Applications within Cloud Computing Environment

  • Wen’an Tan
  • Guangzhen Lu
  • Yong Sun
  • Zijian Zhang
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8351)


Cost minimization under deadline-constraint-based workflow scheduling described by Directed Acyclic Graph (DAG) is a NP-hard problem in Cloud Environment. In order to address such problem, this paper proposes a novel heuristics approach of Concurrent-Level-based Workflow Scheduling (CLWS). It stratifies all the tasks according to the concurrence among tasks during the actual workflow execution. CLWS distributes the total redundancy time into every level according to their concurrent degree. As well as it adopts the algorithm of Markov Decision Process (MDP) to optimize tasks, which have time dependence with each other in the same level. The Simulation results show that CLWS can give a better optimized result.


workflow scheduling cost/time tradeoff heuristics concurrent level 


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Wen’an Tan
    • 1
    • 2
  • Guangzhen Lu
    • 1
  • Yong Sun
    • 1
  • Zijian Zhang
    • 1
  1. 1.School of Computer Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjingChina
  2. 2.School of Computer and InformationShanghai Second Polytechnic UniversityShanghaiChina

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