Modeling And Simulating Of Video Grid With Hybrid Architecture

The video grids based on hybrid structure use host resources of clients to provide video services for other users, so the transmission path of video data stream is shortened, and the system structure is extended, at the same time the service abilities of the system is enhanced. However, because the difference of the client’s host performance and often joining or exiting the system freely, they bring great difficulty to service ability and stability judgment of system. In order to solve these problems, this paper drew on method of complex system analysis in the control field, and used the Anylogic simulation software, a hybrid structure of video grid model is built. Then the simulation of structure is analyzed, which provides the decision-making support for the construction of the actual video grids.In this paper, in the process of modeling, utilizing the discrete system simulation principle, system analysis method and other related theories, combined with the actual situation of the online user request, distribution of each node resource and resource scheduling strategy and other aspects, we analyzed and researched on the system from the micro perspective. The main work is as follows:First, through the research on Anylogic simulation platform, aiming at the characteristics of hybrid architectures of video grid structure, a hybrid structure of video grid node element library is constructed. Attributes of each node component library can be adjusted by the parameters. The request elements of Online customer service can be set for distribution rules of uniform, random, Poisson. The scheduler can be set to scheduling strategies of stochastic, load balancing, local preference. By the means of adjusting the parameters the performance analysis of video grid model based hybrid structure is carried on, and the node configuration scheme is realized according to different situations.Secondly, the dynamic simulation method of discrete event system is studied, and basing on the AnyLogic simulation platform, the microscopic simulation model of hybrid structure of video grid system is built. At the same time we gives out the evaluation index and its modeling method of system dynamic simulation. With the help of the Lanzhou University of Technology campus network providing the television channel of video service operation for all of the users in the university, as a reference, setting simulation parameters, the simulation of the system is carried out.Last, an in-depth study of the system service capability and stability problem is underway in a quantitative form,and we get the law of system service capability and stability changing with parameters of the number of online users, the number of films, the degree of film heat, client service contribution. On the basis of these studies, the resource scheduling strategy, node number and location in the system deployment are optimized. The system service abilities are improved. Through the simulation system, the design scheme of video grid can be verified, the performance of system is tested, and the system bottlenecks are eliminated. Then the implementation of construction and the project of actual hybrid architecture of video grid system are guided.