QoS-Assured Service Composition in Managed Service Overlay Networks

Many value-added and content delivery services are being offered via service level agreements (SLAs). These services can be interconnected to form a service overlay network (SON) over the Internet. Service composition in SON has emerged as a cost-effective approach to quickly creating new services. Previous research has addressed the reliability, adaptability, and compatibility issues for composed services. However, little has been done to manage generic quality-of-service (QoS) provisioning for composed services, based on the SLA contracts of individual services. In this paper, we present QUEST, a QoS assUred composEable Service infrasTructure, to address the problem. QUEST framework provides: (1) initial service composition, which can compose a qualified service path under multiple QoS constraints (e.g., response time, availability). If multiple qualified service paths exist, QUEST chooses the best one according to the load balancing metric; and (2) dynamic service composition, wh...

• Type: Conference
• Year: 2003
• Where: ICDCS
• Authors: Xiaohui Gu, Klara Nahrstedt, Rong N. Chang, Christopher Ward
• Keywords: Distributed And Parallel Computing, ICDCS 2003, Qualified Service Paths, Service Composition, Service Overlay Network