A Novel Video Layout Strategy for Near-Video-on-Demand Servers

Near-Video-on-Demand (NVOD) provides customers with a service model completely different from true Video-on-Demand (VOD). In the NVOD service model, customers’ requests are not serviced immediately. NVOD servers typically support limited VCR functions. Since the NVOD service needs to be much cheaper than the VOD service, it is important to minimize the server’s cost. In this paper, we present a novel video layout strategy for NVOD servers that enforce sequential disk access. Thus, the disk bandwidth is optimally utilized. We define a model that analyzes the storage subsystem behavior, buffer requirements, and usage. Strategies that match the actual disk bandwidth to the application bandwidth requirements are developed. Using this layout strategy, each disk can deliver 50% more streams than can a VOD system, and memory buffers are reduced by almost half. Since disks and memory account for a significant portion of the total system cost in a video server, using these strategies signi...

• Type: Conference
• Year: 1997
• Where: ICMCS
• Authors: Shenze Chen, Manu Thapar
• Keywords: ICMCS 1997, Multimedia, NVOD, Nvod Server, NVOD Service