关键词: 云存储, 传输, 效率, 阈值, 打包

Abstract:

As a critical part of the cloud computing technology, cloud storage includes two aspects: selection of storing position and file transfer. File transfer consists of file uploading and downloading. As an important part of storage, file transfer has a profound impact on cloud storage efficiency. In recent years, much research focuses on the efficiency of data storage and data transfer. In order to solve the lowefficient transfer of a large number of streaming media files in the private cloud environment, we propose a file transfer scheme called threshold upload scheme (THU). We assume that both in  different cloud environments and transfer client computers, there is a file size value fk. When a file size is smaller than fk, we package several of them into one file in a lossless way, whose size value is close to fk. Otherwise, if a file is larger than fk, it will be divided into several fk siz files. In this way the time consumption is reduced compared to the traditional methods. We carried out  many experiments and the results prove that the existence of value fk in transferring streaming media files in the lab cloud environment via ftp protocol. When the package size is equal to fk, time for packing, unpacking and transferring can be optimized, which proves the efficiency and accuracy of the THU scheme.

Key words: cloud storage;transmission;efficiency;threshold;package