P2P Vod System Design And Impletemnt Under Linux

The aim of this thesis is to design and implement a system combined BT site network and P2P streaming media technology. The system implementation wish to be a supplement of the current application of streaming media services, which using center server as mainly support and using P2P as subsidiary technology, and also to be a development of torrent site web application.This thesis mainly contains the following contents:First, after brief introduction of the technology of BT, for some problems in some application scenarios of the system may encounter, we achieve some improvements in piece picking policy in BT protocol stack. For the scenario, the problem analysis are also given in this paper, after principle of improvement is expounded, core code for implementation is proposed. Meanwhile, for the realization of the principle of improvement policy, we analyzed in subsequent research, the need for further processing problems on incentives.Second, in system design and implementation of the section, around the file object, that abstract object all operations could connected to during system runtime, the main part in the system is introduced, with code viewing, in order to the reader can quickly understand the system design and implementation of the logic. Frontend-backend separation of structure model is used in system implementation, the purpose is to achieve the goal of high polymerization and low coupling at the same time, be able to provide follow-up extension.Third, in the test, contrast test is used to test piece picking policy improvement, the test results show that the improved selection of films strategy under certain circumstances has certain advantages over the original protocol stack algorithm, although there is still further improvement strategy is room for improvement, but for under certain circumstances, improvement strategies to deal with issues we have raised enough. The test results for the system, the system can be achieved on the basis of streaming media capabilities, and effect from test environment to test results is analyzed.