This paper presents a full image about Cloud computing by describing in details the Cloud computing components, the deployment framework, Cloud services, and Cloud contributors, reviewing the standardization efforts and research challenges as well as the current and future opportunities for investment. The full image is accomplished by demonstrating our experimental experience for deploying the Cloud computing environment based on OpenStack. Furthermore, this work reviews the literature for the

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... most recent research work considering service management, Virtual Machine migration, load balancing, Green Cloud, privacy and security. The study shows that a lot of work is still needed to provide services that are available, reliable, and secured with minimum cost, maintaining power saving and best utilization of resources. Coinciding with developing services efficiently, the huge amount of data that Cloud computing deals with extends the work in the Internet of Things, and Big Data.