Abstract

The use of multiple clouds brings many advantages: cost optimization, Quality-of-Service (QoS) improvements, high availability, avoidance of vendor lock-in, disaster recovery and so on. However, currently the cloud vendor is largely proprietary and different cloud vendors have their own heterogeneous infrastructure, making it difficult for users to utilize resource from multiple cloud vendors. As a result, users have to manage distributed applications spanning multiple clouds and take into consideration the services migration for reasons like best cost efficiency. In this paper, we introduce the notion of Virtual Cloud and focus on the issues related to multi-cloud resource management in Virtual Cloud. Virtual Cloud is a customized cloud by aggregating resources and services of different clouds and aims to provide end users with a specific cloud working environment. It will ease users' burden of resource and distributed application management as well as the workload migration across cloud.

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