云服务环境下媒体播放设备架构设计及实现

发布时间：2018-05-03 12:47

本文选题：云服务 + 多媒体　；参考：《南京理工大学》2013年硕士论文

【摘要】：随着经济的发展和科技的进步,媒体播放设备已经成为人们日常生活和工作中不可缺少的一部分,但媒体播放设备的资源文件具有数据量大、更新速度快等特点,仅靠这些设备本身的存储能力已经很难满足日益增长的存储需求。另外,互联网的快速发展,极大地改变人们的生活方式、加速人类社会信息化进程,同时也使得网络上的数据以爆炸式的速度不断增长,因此快速准确地从互联网上获取用户需要的资源已显得非常必要。本文设计并实现了一种基于云存储搜索技术的媒体播放设备文件系统,旨在解决媒体播放设备存储资源受限和准确获取用户需要的资源的问题。介绍了传统文件系统的结构以及开发文件系统的方式,研究了传统文件系统的缓存替换策略,在网络环境下该考虑的因素；提出了基于云服务环境的媒体播放设备的整体架构,并给出了各模块的详细设计；在S3C2440、Linux环境下对提出的设计方案进行实现,将云存储搜索引擎的搜索结果组织成Linux用户空间的文件系统,与操作系统紧密结合,将搜索结果以文件系统的形式提供给用户使用；在基于成本的算法LCU(Least Costly Used)[2]基础上,提出符合本文设计的MPC-FS文件系统特点的缓存替换算法；最后对实现的原理样机进行功能和文件系统接口的完备测试,并对系统性能做了分析。经测试,系统完成了预定的目标,而且运行稳定。
[Abstract]:With the development of economy and the progress of science and technology, the media broadcasting equipment has become an indispensable part of people's daily life and work, but the resource files of the media playing equipment have the characteristics of large amount of data, fast updating speed and so on. The storage capacity of these devices alone has been difficult to meet the growing demand for storage. In addition, the rapid development of the Internet has greatly changed people's way of life, accelerated the information process of human society, and at the same time made the data on the network continue to grow at an explosive rate. Therefore, it is necessary to quickly and accurately obtain the resources that users need from the Internet. This paper designs and implements a media playback device file system based on cloud storage search technology, which aims to solve the problem of limited storage resources of media playback devices and accurate access to the resources required by users. This paper introduces the structure of the traditional file system and the way of developing the file system, studies the cache replacement strategy of the traditional file system and the factors to be considered in the network environment, and puts forward the overall architecture of the media playback device based on the cloud service environment. The detailed design of each module is given, the design scheme is implemented under the environment of S3C2440Linux, the search results of the cloud storage search engine are organized into a file system of Linux user space, and the system is closely combined with the operating system. The search results are provided to users in the form of file system, and based on the cost based algorithm LCU(Least Costly used [2], a cache replacement algorithm is proposed, which conforms to the characteristics of the MPC-FS file system designed in this paper. Finally, the function and file system interface of the prototype are tested, and the performance of the system is analyzed. After testing, the system has achieved the predetermined goal, and the operation is stable.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP393.09

【参考文献】