An Effective Data Placement Scheme for Supporting VCR Functionality in an Video Server

Abstract

Recently, the video server plays an important role in VOD or near VOD system. In general, a good video server can not only provide star/stop operations for playback of each request, but also support VCR functionality. In this thesis, we will propose an effective data placement method, called Enhanced-Segment-Placement (ESP) scheme, to support VCR operations built in our video server management platform. Its placement pattern provides uniform load balance for arbitrary retrieval rate as well as normal rate playback. Some distinguished features are explored by appropriate analytic approach. Meanwhile, experiments show that our scheme will have higher throughput, lower reject probability as well as better load balance factors compared with other methods. The detailed description of ESP scheme and its implementation and evaluations will be given in the literature.