A common application-centric QoS model for selecting optimal grid services1

Abstract

QoS (AQoS) model is needed for evaluating semantic equivalent Grid Services in an application-oriented service Grid. Previous related researches on QoS mainly are for resource allocation in computing Grids or for evaluating Web Services. Their approaches are not suitable for evaluating Grid Services and no common AQoS models are defined. According to the characteristics of Grid Services, an AQoS model named as GS_AQoS for Grid Services is proposed, which consists of evaluation factors, evaluation modes and constraints. By analyzing the differences between AQoS for Grid Services and ordinary QoS for Web Services, factors suitable for GS_AQoS are defined, and three types of evaluation modes summarized on applications' needs are addressed in detail. At last, a Grid Services for manufacturing parts is used as an example, by simulation experiments, the availability of GS_AQoS is verified, and some suggestions are given. © Springer-Verlag Berlin Heidelberg 2005.