Multimedia Data Management System For Dynamic Clustered Streaming System

Along with fast developing of Internet, streaming media systems such as remote education, video on demand and video conference become hotspots. But because of the rapid increase in customers and the restricts of Internet, streaming media systems with high throughput, easy expansibility and excellent transport protocols are in need. In order to solve these problems, ICT put forward a streaming media system BigHammer, which not only has dynamic clustered structure for good performance, but also has excellent transport protocols. This thesis is based on research of BigHammer and focuses on MMCSS (Multimedia data Management for Clustered Streaming Servers).MMCSS is the base of dynamic clustered structure, and it manages the placement of multimedia data so that applications can read and write them very easy; after BigHammer changes the capacity of storage, MMCSS is responsible for reorganizing multimedia data on new storage to guarantee system performance. Firstly, the thesis introduces structure and system demands of BigHammer, and analyzes some multimedia data management systems. For dynamic clustered structure, cost of data reorganization which includes amount of moved data blocks and computing time, is a key for the system. The current data management systems cannot give good result, so how to reduce cost of data reorganization becomes MMCSS's main aim.After that, the thesis gives the design of MMCSS. MMCSS has three modules, which are Library, Manager and Storager, and three kinds of services, which are data update, data reorganization and data read. Moreover, multimedia files are parted into blocks...