Title :
QoS-assured service composition in managed service overlay networks
Author :
Gu, Xiaohui ; Nahrstedt, Klara ; Chang, Rong N. ; Ward, Christopher
Author_Institution :
Dept. of Comput. Sci., Illinois Univ., Urbana, IL, USA
Abstract :
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, which can dynamically recompose the service path to quickly recover from service outages and QoS violations. Different from the previous work, QUEST can simultaneously achieve QoS assurances and good load balancing in SON.
Keywords :
Internet; computer network management; quality of service; resource allocation; Internet; QUEST framework; QoS-assured service composition; SLA; content delivery service; dynamic service composition; load balancing metric; service level agreement; service overlay network; value-added service; Computer network management; Contracts; Intelligent networks; Load management; NASA; Peer to peer computing; Portals; Protocols; Quality of service; Web and internet services;
Conference_Titel :
Distributed Computing Systems, 2003. Proceedings. 23rd International Conference on
Print_ISBN :
0-7695-1920-2
DOI :
10.1109/ICDCS.2003.1203466