Pipelining mechanism to minimize the latency time in hierarchical multimedia storage managers

  • Authors:

  • Shahram Ghandeharizadeh;Ali Dashti;Cyrus Shahabi

  • Affiliations:

  • Department of Computer Science, University of Southern California, Los Angeles, CA 90089, USA;Department of Computer Science, University of Southern California, Los Angeles, CA 90089, USA;Department of Computer Science, University of Southern California, Los Angeles, CA 90089, USA

  • Venue:
  • Computer Communications
  • Year:
  • 1995

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Abstract

An emerging area of database system research is to provide support for continuous media data types (digital audio and video). These data types are expected to play a major role in applications such as library information systems, scientific databases, entertainment technology, etc. They require both a high volume of storage and a high bandwidth requirement for their continuous display. The storage organization of systems that support these data types is expected to be hierarchical, consisting of one or more tertiary storage devices, several disk drives, and some memory. The database resides permanently on the tertiary storage device. The disk drives store a number of frequently accessed objects, while the memory is used to stage a small fraction of a referenced object for immediate display. When a user references an object that is tertiary resident, if the system elects to materialize the object on the disk drives in its entirety before initiating its display then the user would observe a high latency time. This paper describes a general purpose pipelining mechanism that overlaps the display of an object with its materialization on the disk drives in order to minimize the latency time of the system. The pipelining mechanism is novel because it ensures a continuous retrieval of an object to a display station (in order to support its continuous display).