Interactive media server with media synchronized RAID storage system

• DOI: 10.1145/1065983.1066024
• Publication Date: 2005-08-03T08:31:47Z
• Authors: Seung-Ho Lim; Yo-Won Jeong; Kyu-Ho Park
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

We propose an efficient placement algorithm and per-disk prefetching method to effectively support interactive operations in the media server. Our placement policy is incorporated with an encoder having a special bitcount control scheme that repeatedly tunes quantization parameters to adjust the bitcounts of video frames. This encoder can generate coded frames sub-stream video blocks whose sizes are synchronized with the RAID stripe size, so that when various fast-forward levels are accessed we can reduce the seek and rotational latency and enhance the disk throughput of each disk in the RAID system. In the experimental results, the proposed placement policy and bitrate control scheme can significantly improve the average service time, which can enlarge the capacity of the interactive media server.