| VOD (Video On Demand) is a multimedia of technology and network technology to develop a product is a new information technology services. It satisfies people to watch their own programs, randomly access to the information needs of many of our lives and bring to facilitate learning. By conducting in-depth discussions on the VOD system, and in light of its own reality, the article researches and gets the implementation of the Tianjin CTT VOD system.Tianjin CTT VOD system is made up of the main Web site, LVS load balancing, media services, distributed storage network components. Druing system designing, it adapts the advanced streaming media technology, LVS load balancing technology, distributed network storage technologies and the media document of the technology, and other mainstream technologies and advanced concepts. Web site has adopted a three-tier structure designed to achieve B/S model ASP dynamic call from the realization of the right to operation of the database and business logic of the calculation.The idea is to design systems such as RM or RMVB format video or documents stored in distributed network storage systems. According to the the requesting location of system users, The system will assign the users' requests to the best media server based on the LVS distribution strategy , then re-circulate through the media, the media have a corresponding server to client and real-time decoding broadcast.VOD system is based on achieving the goal of this structure, and the use of cluster technology to be fully distributed architecture of the VOD System Design and Implementation of the Tianjin CTT.The system not only guarantees the realization of VOD users to watch the broadcast of speed and quality viewing but also achieves a balanced flow of information in the local nodes, Internet backbone bandwidth to resolve the issue of using CTT increases the efficient use of bandwidth. It was good for the economic and social benefits through its application and promotion. |
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