Towards a Holistic Multi-Cloud Brokerage System: Taxonomy, Survey and Future Directions

The use of Cloud Computing can increase the service efficiency and Service Level Agreement for cloud users by linking them to the appropriate cloud service provider using cloud services brokerage paradigm. Cloud services brokerage represents a new promising layer to be added to cloud computing network, which manages the use, performance and delivery of cloud services; and negotiates relationships between cloud services providers and cloud services consumers. The work presented in this paper studies the research related to cloud service brokerage systems along with the weaknesses and drawbacks associated with each of these systems, with a particular focus on the multi-cloud-based services environment. In addition, the paper will end up with a proposed multi-cloud framework that overcomes the weaknesses of the other listed cloud brokers. The new framework aims at finding the appropriate data centre in terms of energy efficiency, QoS, and SLA. Moreover, it highlights the entire key features that must be available in the multi-cloud-based brokerage systems.