Abstract
Disaster recovery is a persistent problem in IT platforms. This problem is more crucial in cloud computing, because Cloud Service Providers (CSPs) have to provide the services to their customers even if the data center is down, due to a disaster. In the past few years, researchers have shown interest to disaster recovery using cloud computing, and a considerable amount of literature has been published in this area. However, to the best of our knowledge, there is a lack of precise survey for detailed analysis of cloud-based disaster recovery. To fill this gap, this paper provides an extensive survey of disaster recovery concepts and research in the cloud environments. We present different taxonomy of disaster recovery mechanisms, main challenges and proposed solutions. We also describe the cloud-based disaster recovery platforms and identify open issues related to disaster recovery.
Highlights
Cloud computing becomes more popular in large-scale computing day by day due to its ability to share globally distributed resources
The private clouds are established for any enterprises consist some servers and an Local backup server (LBS); and an inter-private cloud storage is created in a public cloud consists the remote backup server (RBS) to be shared between public clouds
We have provided an in depth analysis of the state of the art for DR in cloud computing
Summary
Cloud computing becomes more popular in large-scale computing day by day due to its ability to share globally distributed resources. In the shared model (we can call it distributed approach) an infrastructure is assigned to more multiple users This approach decreases both cost and speed of recovery. Cloud computing is a way to gain both dedicated and shared model benefits It can serve DR with low cost and high speed. Cloud computing decreases data synchronization between primary and backup site, minimizes different kinds of cost while increases independency between users' infrastructure and their DR systems. Organizations and businesses can use DR services which are served by cloud service providers Using these services, data protection and service continuity are guaranteed for customers at different levels. The paper ends with the proposed overall DR procedure and conclusion
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