Antonio Celesti

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Small/medium cloud storage providers can hardly compete with the biggest cloud players such as Google, Amazon, Dropbox, etc. As a consequence, the cloud storage market depends on such mega-providers and each small/medium provider cannot face alone the challenge of Big Data storage. A possible solution consists in establishing stronger partnerships among(More)
Cloud Computing is becoming one of the most important topics in the IT world. Several challenges are being raised from the adoption of this computational paradigm including security, privacy, and federation. This paper aims to introduce new concepts in cloud computing and security, focusing on heterogeneous and federated scenarios. We present a reference(More)
Cloud federation offers plenty of new services and business opportunities. However, many advanced services cannot be implemented in the real Cloud market due to several issues that have not been overcome yet. One of these concerns is the transfer of huge amount of data among federated Clouds. This paper aims to overcome such a limitation proposing an(More)
Cloud federation is the future of the cloud computing. In such new emerging scenarios, the "hot" and "cold" migration imply the movement of a virtual machine disk-image from a server placed in a cloud provider to a server placed in another one, with a consequent consumption of bandwidth and cloud resources. This paper aims to reduce such costs proposing a(More)
Cloud federation aims to cost-effective assets and resources optimization among heterogeneous environments where clouds can cooperate together with the goal of obtaining unbounded computation resources, hence new business opportunities. This paper describes an architecture for the federation establishment, where clouds that need external resources ask to(More)
Nowadays, Cloud federation is paving the way toward new business scenarios in which it is possible to enforce more flexible energy management strategies. Considering independent Cloud providers, each one is exclusively bound to the specific energy supplier powering its datacenter. The situation radically changes if we consider a federation of cooperating(More)
Cloud environments offer a variety of concrete and abstracted entities which need to be identified. An example of cloud environment is the European project RESERVOIR, which similarly to other platforms characterized by a high level of dynamism, needs to identify and resolve resources. RESERVOIR has to manage allocation, deallocation and migration of virtual(More)
This paper focuses on Platform as a Service (PaaS). From the advent of Cloud computing, the latest trend has been to design ad hoc platforms specialized to address given operational scenarios. In this context, the need of an adaptable, fault tolerant and secure cloud platform for the development of specific PaaS is becoming more and more compelling. In this(More)
Nowadays, cloud federation is paving the way toward new business scenarios in which it is possible to enforce more flexible energy management strategies than in the past. Considering independent cloud providers, each one is exclusively bounded to the specific energy supplier powering its datacenter. The situation radically change if we consider a federation(More)