Improving multimedia systems performance using constant-density recording disks

  • Authors:
  • Philip Kwok Chung Tse;Clement H. C. Leung

  • Affiliations:
  • Victoria Univ. of Technology, Footscray, Victoria, Australia;Victoria Univ. of Technology, Footscray, Victoria, Australia

  • Venue:
  • Multimedia Systems
  • Year:
  • 2000

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Abstract

Multimedia systems store and retrieve largeamounts of data which require extremely high disk bandwidth and their performance critically depends on the efficiency of disk storage. However, existing magnetic disksare designed for small amounts of data retrievals geared totraditional operations; with speed improvements mainly focused on how to reduce seek time and rotational latency.When the same mechanism is applied to multimedia systems,overheads in disk I/O can result in dramatic deterioration insystem performance. In this paper, we present a mathematical model to evaluate the performance of constant-density recording disks, and use this model to analyze quantitatively the performance of multimedia data request streams.We show that high disk throughput may be achieved by suitably adjusting the relevant parameters. In addition to demonstrating quantitatively that constant-density recording disksperform significantly better than traditional disks for multimedia data storage, a novel disk-partitioning scheme whichplaces data according to their bandwidths is presented.