Constructing a video server with tertiary storage: practice and experience

  • Authors:

  • Hojung Cha;Jongmin Lee;Jaehak Oh

  • Affiliations:

  • Department of Computer Science, Yonsei University, Seodaemun-gu, Shinchon-dong 134, Seoul 120-749, Korea;Department of Computer Science, Yonsei University, Seodaemun-gu, Shinchon-dong 134, Seoul 120-749, Korea;Department of Computer Science, Kwangwoon University, Nowon-gu, Weolgye-dong 447-1, Seoul 139-701, Korea

  • Venue:
  • Multimedia Systems
  • Year:
  • 2002

Quantified Score

Hi-index 0.00

Visualization

Abstract

Handling a tertiary storage device, such as an optical disk library, in the framework of a disk-based stream service model, requires a sophisticated streaming model for the server, and it should consider the device-specific performance characteristics of tertiary storage. This paper discusses the design and implementation of a video server which uses tertiary storage as a source of media archiving. We have carefully designed the streaming mechanism for a server whose key functionalities include stream scheduling, disk caching and admission control. The stream scheduling model incorporates the tertiary media staging into a disk-based scheduling process, and also enhances the utilization of tertiary device bandwidth. The disk caching mechanism manages the limited capacity of the hard disk efficiently to guarantee the availability of media segments on the hard disk. The admission controller provides an adequate mechanism which decides upon the admission of a new request based on the current resource availability of the server. The proposed system has been implemented on a general-purpose operating system and it is fully operational. The design principles of the server are validated with real experiments, and the performance characteristics are analyzed. The results guide us on how servers with tertiary storage should be deployed effectively in a real environment.