MARDO: A novel schema of dynamic QoS optimizing for composite web services using cooperative agents

The paper proposes a novel schema — MARDO for dynamic composite web services resources QoS optimizing using cooperative agents. The paper first introduces the QoS model of web service resources and its mathematical definitions. Then provides MARDO to monitor and optimize the runtime status of composite web services. It parses the structure and the QoS requirement of the composite service workflow into the specific QoS demand. And then selects appropriate primitive web services. Furthermore MARDO could adjust itself to fit the new demand when the requirement is modified. The schema also provides a flexible way to manipulate heterogeneous web services which provide different management interfaces by taking advantage of agents assistant and web service based management protocol. The contribution of the paper is providing an efficient schema to help composite web services providers optimize their services dynamically according to on demand requirement.