DAG Task Scheduling Integrating with Security and Availability in Cloud Environment
Yaqi Liu · 2014
For the instability of security and availability of resource in the heterogeneous and complex cloud environment,a DAG task scheduling strategy is proposed to satisfy the demand for security and availability of cloud tasks,which is integrated with both security and availability in cloud computing environment. The strategy first modifies the subjective logical trust model to calculate the reputation of cloud resource that is the basis of scheduling,and then qualifies the availability deviation of tree cloud resource and DAG task,and finally defines the schedule function and greedy scheduling algorithm integrating with security and availability,called ISAG. Simulation results prove that ISAG can efficiently meet the requirement of tasks on cloud platform of low availability and low security,and gets better performance and higher execution success rate compared with DLS and Afsa.