Combining reliability, reputation and honesty to enhance QoS on federated computing infrastructures

In this paper, we suggest an approach aimed at maximising the "global utility"(i.e., QoS) perceived into a large-scale federated computing infrastructures. Our approach computes the node and starts a procedure for the formation of coalitions between them. In particular, it is based on a trust model that allows actors to quantify the trustworthiness of their peers, and on a decentralised procedure that allows the Computing Federation to optimise the QoS. We define the generic SLA-based federated architecture, that is the global QoS offered by the federation, and we describe the theoretical foundation on which our proposal is based. Finally, we illustrate the experimental results which prove that the Global Capital of the Computing Federation improves.