QoS Constraint Based Workflow Scheduling for Cloud Computing Services

Guangzhen Lu, Wen'an Tan, Yong Sun, Zijian Zhang, Anqiong Tang
2014 Journal of Software  
QoS constraint based workflow scheduling described by Directed Acyclic Graph (DAG) has been proved to be a NP-hard problem in Cloud Computing Services, especially for cost minimization under deadline constraint. Due to Deadline Bottom Level (DBL) hasn't considered the concurrence during the real executing process that cause much more shatter time to solve such problem, this paper proposes a novel heuristics approach of Concurrent Level based Workflow Scheduling (CLWS). It stratifies all the
more » ... atifies all the tasks according to the concurrence among tasks in the actual workflow execution. Then, CLWS distributes the total redundancy time into every level according to their concurrent degree. The simulation experiments show that CLWS makes a better improvement than DBL.
doi:10.4304/jsw.9.4.926-930 fatcat:semmdxukcfcl3cc7s6kumdckom