Mutual exclusion strategy in a Cloud-of-clouds

A cloud-of-clouds is a virtual cloud storage service using heterogeneous public cloud storage services. To support concurrent accesses for multiple clients, a mutual exclusion is necessary in a cloud-of-clouds. In this paper, we propose a mutual exclusion strategy for concurrent accesses in a cloud-of-clouds. The proposed strategy includes an atomic operation for cloud-of-clouds, a deadlock recovery method and a race condition control method.