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Your search keyword '"Gharbaoui M."' showing total 2 results
Start Over Author "Gharbaoui M." Topic distributed computing
2 results on '"Gharbaoui M."'

1. An SDN orchestrator for cloud data center: System design and experimental evaluation.

Author

Adami, D., Martini, B., Sgambelluri, A., Donatini, L., Gharbaoui, M., Castoldi, P., and Giordano, S.

Subjects
ORCHESTRATORS, CLOUD computing, DISTRIBUTED computing, CLOUD storage, WEB services
Abstract

The high volatility of Virtual Machine (VM) deployments, the unpredictable traffic patterns, and the oversubscription of Data Center (DC) network links give rise to new challenges in data delivery operations in cloud DCs. These challenges can be addressed through a flexible and agile control of DC networks, which is also coordinated, i.e., orchestrated, with the management of computing resources to improve the usage of DC resources while effectively meeting user demands. In this regard, the Software-Defined Network (SDN) paradigm can play a key role thanks to automated and multi-granular network control operations and to a more effective interworking with applications (e.g., cloud management platforms). This paper presents an SDN-based orchestrator able to coordinate the provision of both cloud and network services while jointly arranging VMs and delivery path allocations based on the current load. This approach assures a proper network resource utilization as well as the convey of VM data across the DC network with better than best-effort quality. A prototype is presented with focus on the software design and on the orchestration strategies exploiting measurement-based load estimation mechanisms. The orchestrator has been thoroughly evaluated through a comprehensive set of experiments carried out using a cloud DC testbed. Results show the effectiveness of the proposed SDN-based orchestration approach and the impact of the orchestration strategies on the DC resource utilization. [ABSTRACT FROM AUTHOR]

Published
2017
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2. Integrated signaling framework for joint reservation of application and network resources for the Future Internet

Author

Aldo Campi, Piero Castoldi, Franco Callegati, Barbara Martini, Walter Cerroni, Molka Gharbaoui, Martini B., Cerroni W., Gharbaoui M., Campi A., Castoldi P., and Callegati F.

Subjects
Service (systems architecture), Computer science, business.industry, Distributed computing, Scalability, Next-generation network, Reservation, Resource allocation, The Internet, business, INTERNET, Computer network
Abstract

This work presents a signaling framework for the Future Internet capable of enabling unified network and IT resource allocation. The proposed signaling scheme is based on existing technologies and carried out through extensions to protocols already operated in current Internet, i.e., SIP, and by resorting to source-initiated GMPLS signaling without introducing network technology- dependent mechanisms. The experimental validation presented in this work has been carried out on a real test-bed. Performance of the service set-up procedure are reported taking into account the response time of real life devices such as commercial routers and protocols. The results provided show that the architecture proposed is compliant with conventional performance levels such as those set by the ITU- T. Finally, scalability performance have been verified by stressing the system with increasing rate of simultaneous service requests.

Published
2011

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