Reduce the Probability of Data and Information's Lost in Cloud Computing

This paper is about to reduce the probability of data lost in cloud computing, the methodology is done by OPNET ver 14.5 simulation programm. Three scenarios were designed to get the results, the comparative between results show that the data can be restored from the backup server when the main server is failure or drupe, so the main aim of this paper was achieved (reduce the probability of data lost). Erlang loss formula is also used to calculate the average of data loss in telecommunication and computer networks. OPNET is commercial programme use to simulate and design computer and telecommunication networks.