Int. J. High Performance Computing and Networking, Vol. 9, Nos. 1/2, 2016 19 Copyright © 2016 Inderscience Enterprises Ltd. Cocktail: a service-oriented cloud storage architecture for enhancing service quality Shuchih Ernest Chang Institute of Technology Management, National Chung Hsing University, 250 Kuo Kuang Road, South District, Taichung 402, Taiwan Email: eschang@dragon.nchu.edu.tw Yu-Teng Jacky Jang* Department of Business Administration, Tainan University of Technology, No. 529, Zhongzheng Rd., Yongkang District, Tainan City 710, Taiwan Email: junnbee_cheung@yahoo.com.tw *Corresponding author Wei-Cheng Shen and Wen-Chi Su Institute of Technology Management, National Chung Hsing University, 250 Kuo Kuang Road, South District, Taichung 402, Taiwan Email: iceman.shen@gmail.com Email: crunchxcrunch@gmail.com Abstract: Cloud computing is getting increasingly popular because of its various benefits. Although many free cloud storage services (such as Google Drive, Dropbox, etc.) are available on the internet, there exist some problems in using such services. Those public cloud storage services can be more convenient and more valuable if those problems are resolved. The first problem is the limitation of the service, such as space limit, file size limit and file type limit. Secondly, different cloud storage services provide different functions so that users may have to use multiple services simultaneously in order to fulfil their needs. The process of logging in and using multiple services might be very complicated. Thirdly, users may not be able to access or even lose their data owing to incidents such as server down, network failure, and availability problems. The goal of this research is to compose a service (named Cocktail) by using the service-oriented computing (SOC) as the fundamental design approach to solve these three problems and enhance the service quality (in terms of the reliability, availability and scalability) of free cloud services. Keywords: cloud storage; cloud service integration; cloud storage backup; service-oriented computing; SOC. Reference to this paper should be made as follows: Chang, S.E., Jang, Y-T.J., Shen, W-C. and Su, W-C. (2016) ‘Cocktail: a service-oriented cloud storage architecture for enhancing service quality’, Int. J. High Performance Computing and Networking, Vol. 9, Nos. 1/2, pp.19–30. Biographical notes: Shuchih Ernest Chang is a Professor at the Institute of Technology Management, National Chung Hsing University (NCHU) in Taiwan. He received his MSCS and PhD from the University of Texas at Austin. Before joining the faculty at NCHU, he worked at UBS Financial Services Inc. in the USA as a Divisional Vice President for five years. He has 15 years of working experience in major computer and financial service firms in the USA, including Unisys, IBM, JP Morgan, Bear Stearns, and UBS. His research interests are in electronic commerce, technology management, enterprise application architecture, information systems, and information security management.