Incremental Scheduling of Mixed Workloads in MultimediaInformation Servers

  • Authors:

  • G. Nerjes;P. Muth;M. Paterakis;Y. Romboyannakis;P. Triantafillou;G. Weikum

  • Affiliations:

  • Swiss Federal Institute of Technology, Institute of Information Systems, CH-8092 Zurich, Switzerland. nerjes@inf.ethz.ch;University of the Saarland, Department of Computer Science, D-66041 Saarbrücken, Germany. muth@cs.uni-sb.de;Technical University of Crete, Department of Electronics & Computer Engineering, Chania, Greece. pateraki@ced.tuc.gr;Technical University of Crete, Department of Electronics & Computer Engineering, Chania, Greece. rombo@ced.tuc.gr;Technical University of Crete, Department of Electronics & Computer Engineering, Chania, Greece. peter@ced.tuc.gr;University of the Saarland, Department of Computer Science, D-66041 Saarbrücken, Germany. weikum@cs.uni-sb.de

  • Venue:
  • Multimedia Tools and Applications
  • Year:
  • 2000

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Abstract

In contrast to pure video servers, advancedmultimedia applications such as digital libraries or teleteachingexhibit a mixed workload with massive access to conventional,“discrete” data such as text documents, images and indexes aswell as requests for “continuous data”, like video and audio data.In addition to the service quality guarantees for continuous datarequests, quality-conscious applications require that the responsetime of the discrete data requests stay below some user-tolerancethreshold. In this paper, we study the impact of different diskscheduling policies on the service quality for both continuous anddiscrete data. We provide a framework for describing various policiesin terms of few parameters, and we develop a novel policy that isexperimentally shown to outperform all other policies.