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Multi-Clouds are nowadays motivated by the needs of Cloud service consumers to ensure a certain level of service quality. Main requirements and challenges of the developing Multi-Clouds are analyzed in this paper. A particular attention is payed on the application and service portability. As complementary solution to the current approaches of using uniform application programming interfaces or standard...
The cloud computing paradigm promises increased flexibility and scalability for consumers and providers of software services. Service providers that exploit private cloud environments offer restricted flexibility and scalability because of the limited capacity. However, such organizations are often reluctant to migrate to public clouds because of business continuity threats and vendor lock-in. Hybrid...
Cloud computing has become the focus of attention in the industry, from the point of view of both providers and customers, as well as researchers. However, security concerns still impede the widespread adoption of this technology. Most enterprises are particularly worried about the lack of control over their outsourced data since the authentication and authorization systems of Cloud providers are...
Federated clouds can expose the Internet as a homogeneous compute fabric. There is an opportunity for developing cross-cloud applications that can be deployed pervasively over the Internet, dynamically adapting their internal topology to their needs. In this paper we explore the main challenges for fully realizing the potential of cross-cloud applications. First, we focus on the networking dimension...
The idea of computing utility incarnated by the cloud paradigm is gaining a lot of success, both for entertainment and business applications. The consequent increasing demand of computing, storage and communication resources within data centers is fostering new forms of infrastructure sharing such as cloud federations, which can take advantage of virtualization technologies and, in particular, of...
As cloud computing is increasingly adopted by enterprises, a stringent service level agreement such as response time is required by the cloud in order to run business applications. This can be problematic because activity from geographically distributed terminals owing to globalization often increases the average response time. Federating various clouds enables to utilize datacenters in various geographical...
Cloud computing (the delivery of computing as services rather than products) creates new challenges with respect to openness. Existing approaches such as open source licensing of software products have proven inadequate in a service-oriented world; attempts to address the limitations by closing the “service provider loophole” have failed to gain traction. Similarly, multiple providers are yet to fully...
Business Intelligence systems use information technology to supply integrated management support with data coming from several sources of structured and unstructured data. The integrated infrastructures of Business Intelligence (BI) are often too complex and hence costly and inflexible. A solution for these issues is to leverage cloud computing services to enhance legacy BI systems and applications...
This paper presents a dynamic adaptation process for multi-cloud applications that is composed of two phases. The first one is a modeling phase, which borrows the ability for representing commonalities and variabilities from the software product lines (SPL) paradigm. In this phase, a customized model feature specifies the configuration of cloud services to be used by an application (commonalities)...
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