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Trust and reputation systems represent a significant trend in decision support including selection of best match cloud providers to process Big Data. Reputation is often considered as a collective measure of trustworthiness based on the referrals or ratings from members in a community. Reputation systems have been applied in various applications such as online service provision. However, reputation...
The Cloud computing paradigm is remarkably evolving. Cloud customers have become more conscious about the QoS expectation from Cloud providers' services. Accordingly, Cloud providers are required to be responsive to customers' demands, be open to establishing federations with other providers in order to retain their shares in the competitive Cloud market. Cloud customers are always searching for optimized...
Big Data distribution has benefited from the Cloud resources to accommodate application's QoS requirements. In this paper, we propose Big Data distribution scheme that matches the Cloud available resources to guarantee application's QoS given the continuously dynamic and varying resources of the Cloud infrastructure. We developed Two-Level QoS Policies (TLPS) for selecting clusters and nodes while...
To provide on-demand Cloud services, Cloud providers and customers are used to sign Service Level Agreement (SLA), which is an agreement on the level of service provided and its associated cost. Unfortunately, SLA is not as dynamic as the Cloud and the criteria on which a customer relies to select a provider can be of problematic nature. The provider must optimize its resources although he cannot...
Cloud providers nowadays are required to form a federation of Clouds to remain competitive and gain a share in the Cloud service provision market. This provision is governed by a mutual contract known as Service Level Agreement (SLA), to which both clients and providers are confined. Monitoring activities should be undertaken to guarantee the pre-agreed SLA. However, monitoring multiple SLA in a federated...
Cloud computing is becoming a key element in service provision on the Internet. Businesses are seizing the availability of infrastructure as service to obtain cost effective infrastructure solutions. However, in businesses the power of services emerges from the ability to combine different services in order to obtain some value added services. Cloud services composition presents some challenges like,...
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