Flexible Strategies for Disk Scheduling in Multimedia Presentation Servers

Authors:
S. Emilda;L. Jacob;O. Daescu;B. Prabhakaran
Affiliations:
School of Computing, National University of Singapore, Singapore 119260;School of Computing, National University of Singapore, Singapore 119260;Department of Computer Science, The University of Texas at Dallas, Richardson, USA 75083;Department of Computer Science, The University of Texas at Dallas, Richardson, USA 75083
Venue:
Multimedia Tools and Applications
Year:
2005

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Abstract

Multimedia presentations (e.g., lectures, digital libraries) normally include discrete media objects such as text and images along with continuous media objects such as video and audio. Objects composing a multimedia presentation need to be delivered based on the temporal relationships specified by the author(s). Hence, even discrete media objects (that do not normally have any real-time characteristics) have temporal constraints on their presentations. Composition of multimedia presentations may be light (without any accompanying video or large multimedia data) or heavy (accompanied by video for the entire presentation duration). The varying nature of the composition of multimedia presentations provides some flexibility for scheduling their retrieval. In this paper, we present a min-max skip round disk scheduling strategy that can admit multimedia presentations in a flexible manner depending on their composition. We also outline strategies for storage of multimedia presentations on an array of disks as well as on multi-zone recording disks.