ABSTRACT

Cloud computing has enhanced the technique of computing and the way in which utility services are offered through public network. The IT corporations and Cloud suppliers can join hands and allocate the resources through Cloud federation. By selecting multiple cloud providers in place of a single provider, the different computational obligations can be improved and cost can be reduced. Maximizing performance, improving reliability, scalability, multi-location deployment for error tolerance and recovery, cost minimization, less energy consumption and partnership with other providers are advantages of Federated cloud. But cloud federation has many portability and interoperability issues and encounters many challenges in the deployment of cloud federations like Identity and Access Management. In the paper, we will discuss meaning of cloud federation, benefits of using cloud federation, federation managers especially CCFM (Cross Cloud Federation Manager), classification of federation architectures as per the level of the coupling, resource procuring challenges in a federated cloud and federated architectures.