A. Yousefipour - Department of Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
A. Rahmani - Department of Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
M. Jahanshahi - Central Tehran Branch, Islamic Azad University, Tehran, Iran

Nowadays, maximizing profits, decreasing operating cost and scheduling tasks are the most important issues of cloud computing with its growing usage. In this regard, one of the challenges in cloud computing is to provide an efficient method to deploy virtual machines on physical machines with the aim of optimizing energy consumption, fair load distribution and task scheduling. The purpose of present study is to provide a method for improving task scheduling through an improved particle swarm optimization algorithm. In the proposed method of present study, selection of a proper objective function has led to balanced workload of virtual machines, decreased time of all tasks as well as maximum utilization of all resources and increased productivity in addition to dynamic placement of virtual machine on physical machine. The results of simulation showed that the proposed method has provided an optimized solution for scheduling tasks, equal allocation of tasks in virtual machines and placement on the appropriate physical machine and less time with an improvement of ۰.۰۲ has been spent on the process of outsourcing virtual machines.

cloud computing, Placement, Dynamic Migration, Load Balancing, Particle swarm