Automatic Recommendation of Quality Requirements for Software Services

Abstract

QoS (Quality of Service) provisioning is an important factor that determines the success of any software service deployment. Defining what level of quality a software service should publish in the registry is a big challenge because of (i) the lack of requestor's QoS requirements when a service is firstly published, (ii) the dynamic, diversified QoS requirements of SLAs (Service Level Agreement) and invocation instances to the same service provider, and (iii) the inability of requestors to precisely specify their QoS requirements for the services they demand. In this paper, we propose a mechanism to automatically recommend the QoS requirements of a given service by referencing previously signed SLAs and their associated runtime instance information of all "similar services" within a service community. Both the mathematical model and its supporting system architecture are given. This work is important because it assists service providers to improve their service quality and competitiveness in a given service community.