| Summary: | 碩士 === 國立嘉義大學 === 資訊管理學系碩士班 === 99 === Cloud storage (CS), the data storage system, is widely accepted in the information technology communities. The users, however, require reliability and availability for accessing data from data storage. To achieve these requirements, it needs to consider whether the method of data collection does not facilitate, the retrieval and access data from different places, and the available methods are inefficient and no capacity. In this paper, we will study on how to improve the quality of CS services by study on data duplication of CS system. The study aims to minimize data access time, a suitable bandwidth, and location of data storage. Accordingly, we will study from the available network model, frequency model, delay model, and budget and cost so that to develop a new duplicate data model. The model will propose the solutions and evaluation to achieve near-optimal CS services.
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