SLA Object and SLA Process Modelling using WSLA and BPM Notations - Towards defining a Generic SLA Orchestrator Framework

摘要

SLA monitoring and enforcement ensure service dependability. In an ever challenging market, service providers strive to compete in the IT business by offering new innovative services. Fast to market and reliable Quality of Service goes hand in hand in determining the market leader. To address these challenges, a flexible and comprehensive tool is required to automate the provisioning of SLA and Service Level Management processes. Based on our investigation there is no single framework, which is flexible enough to orchestrate SLA provisioning for multiple services. To address this problem, we first describe the SLA object concepts and redefine the SLA management processes. It introduces an extended WSLA model and tiering mechanism, to promote modularity and reusability of the SLA model. We propose to model the SLA management process using the Business Process Management Notation to simplify and reduce the planning, design, and implementation effort in defining the SLA offerings. Both of these models act as guidelines to attain a generic SLA framework towards any service adaptation.