Availability of Web Services based on Autonomous Classification and Negotiation of SLAs

摘要

Establishing and ensuring the QoS (quality of service) of a component like a Web service is a critical issue, this must allow establishing a trust relationship between the service provider and a client waiting for certain reliability. However, unlike well-established specifications in the functional domain of Web services (such as WSDL, SOAP, or UDDI), there are no officially recognized standards for the description and establishment of QoS properties. However, a number of works aim to provide answers to this shortcoming through Service Level Agreements (SLAs), the goal of which is to enable an agreement between consumers and service providers to be reached on the level Of QoS that the service must provide. The solution proposed in this article allow us to resolve in one hand the problem of manual management, and in the other hand the problem of congestion, in other words the time of response will decrease. Moreover, it our principal purpose is to guarantee high availability of services by the abstraction of the provider of service. Moreover the goal is to improve availability and reducing response time by classification of SLAs using k-means algorithm.