Cloud service brokerage is an emerging technology that attempts to simplify the consumption and operation of hybrid clouds. Today's cloud brokers attempt to insulate consumers from the vagaries of multiple clouds. To achieve the insulation, the modern cloud broker needs to disguise itself as the end-provider to consumers by creating and operating a virtual data center construct that we call a meta-cloud, which is assembled on top of a set of participating supplier clouds. It is crucial for such a cloud broker to be considered a trusted partner both by cloud consumers and by the underpinning cloud suppliers. A fundamental tenet of brokerage trust is vendor neutrality. On the one hand, cloud consumers will be comfortable if a cloud broker guarantees that they will not be led through a preferred path. And on the other hand, cloud suppliers would be more interested in partnering with a cloud broker who promises a fair apportioning of client provisioning requests. Because consumer and supplier trust on a meta-cloud broker stems from the assumption of being agnostic to supplier clouds, there is a need for a test strategy that verifies the fairness of cloud brokerage. In this paper, we propose a calculus of fairness that defines the rules to determine the operational behavior of a cloud broker. The calculus uses temporal logic to model the fact that fairness is a trait that has to be ascertained over time; it is not a characteristic that can be judged at a per-request fulfillment level. Using our temporal calculus of fairness as the basis, we propose an algorithm to determine the fairness of a broker probabilistically, based on its observed request apportioning policies. Our model for the fairness of cloud broker behavior also factors in inter-provider variables such as cost divergence and capacity variance.
翻译:云层服务中介是一种新兴技术,它试图简化混合云的消费和运行。 今天的云介介介质试图将消费者与多种云层的变幻莫测隔离开来。 为了实现绝缘,现代云介质需要通过创建和运行一个虚拟数据中心结构,将自己伪装成消费者的最终提供者,我们称之为一个超级云层,它聚集在一组参与的供应商云层之上。对于这样一个云介质经纪人来说至关重要。云介质的基本原则是供应商的中立性。一方面,如果云介质保证他们不会通过偏好的道路来引导消费者。而另一方面,云介质中介商需要将自己伪装成消费者的最终提供者。由于消费者和供应商对元球介质的信任来自于对供应商云层的认知性,因此有必要有一个测试策略来验证云介质的公正性。在本文中,如果云介质的公平性保证他们不会通过偏好的道路来引导消费者。 而云介质供应商则更愿意与一个云介质的中间人合作。由于消费者和供应商之间的信任性信任来自对供应商云层云层的假设性,因此需要一种测试战略来验证云团的公平性。 在本文中, 我们的模型中,我们提出一个计算中选择一个正标的公平性标准是一种确定一个确定一个准确的准确性标准, 。