Title :
Configuration and Optimization of Virtual Business in Cloud Computing Environment
Author :
Hongjun Sun ; Shuangxi Huang ; Yushun Fan ; Wei Su
Author_Institution :
China Aerosp. Eng. Consultation Center, Beijing, China
Abstract :
Cloud computing enables the realization of virtual business through outsourcing business functions to online services. Due to the large number of available business services and candidate cloud service providers, the configuration and optimization of the virtual business becomes a key issue for a service-oriented business ecosystem. In this paper, the virtual business is regarded as a series of service processes. Constrained service workflow net (CSWF-net) is developed to describe the component and structure of such service processes. Considering the dynamic and stochastic nature of services in a cloud computing environment, a stochastic decision making approach for CSWF-net is proposed in which the state transition of services is characterized as a Continuous Time Markov Chain (CTMC). Based on the four control structures of service processes, the dynamic Quality-of-Service (QoS) aware selection and composition problem is formulated as a Stochastic Linear Programming (SLP) model. Mixed policies generated by the branch and bound algorithm and modified heuristic approach are used to solve the dynamic QoS-aware selection and composition problem at runtime. In the meantime, the most appropriate business services and cloud service providers can be selected to support the execution of the virtual business effectively.
Keywords :
Markov processes; Petri nets; cloud computing; linear programming; quality of service; stochastic programming; tree searching; virtual enterprises; CSWF-net; CTMC; QoS aware composition; QoS aware selection; SLP model; branch-and-bound algorithm; business function outsourcing; business service; cloud computing environment; cloud service provider; constrained service workflow net; continuous time Markov chain; modified heuristic approach; quality-of-service; service-oriented business ecosystem; stochastic decision making approach; stochastic linear programming; virtual business configuration; virtual business execution; virtual business optimization; Business; Cloud computing; Heuristic algorithms; Linear programming; Measurement; Quality of service; Stochastic processes; Service processes; continuous time markov chain; service workflow net; stochastic linear programming;
Conference_Titel :
Cloud and Green Computing (CGC), 2012 Second International Conference on
Conference_Location :
Xiangtan
Print_ISBN :
978-1-4673-3027-5
DOI :
10.1109/CGC.2012.73