In recent years, the advent of online data storage services has been enabled users to save their data and operational programs in cloud databases. Using an efficient and intelligent management helps to optimize quality of provided services. Also it is possible to increase throughput of services by eliminating repeated data. In following article we have offered a completely dynamic approach to detect and eliminate duplicated data which exist in shared storage resources among virtual machines. Results of simulation show that proposed approach, compared to the similar approaches, will save the storage space substantially by reducing usage of CPU, RAM, also will increase rate of de-duplication data up to 23 %.