Workflow security scheduling strategy in cloud computing

Abstract

Cloud computing is an effective technology that delivers interesting services to customers over the Internet. It is beneficial for scientific workflow systems in view of its powerful characteristics. However, scheduling workflow system over a cloud platform has become a challenging problem. In this paper, we propose a novel workflow scheduling strategy for the hybrid cloud environments which consists of an economical distribution of tasks between the various cloud service providers, in order to provide customers with high security services. Then, we study the impact of that security services on the total cost and deadline generated by the workflow. This problem is a major gap in the workflow scheduling field and it is still insufficiently explored in the literature. Our proposed scheduling system is composed for three modules. The first module is the Pre-Scheduler, the second is the Security Enhancement Module and the third one is the Post-Scheduler. The system evaluation and the extensive simulations are performed using an extension of Cloudsim simulation tool. The results show that our strategy preserves the same cost however it affects the deadline.