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Abstract
A growing number of applications need access to video data (e.g.,
video-on-demand, digital library, multimedia messaging). As a result,
the load on continuous media servers responsible for the storage and
retrieval of videos, either from disks or from tertiary
storage devices, is becoming increasingly significant. The capacity of
such continuous media servers is determined by the number of underlying
disk drives as well as on the amount of memory available in the system.
To increase the number of clients that can be supported,
the clients' disks could be used as an alternative caching device in which to
store video data. In this way, a client has the option of retrieving data from
the server or from a near by client, thereby reducing the load of the server
and increasing the overall capacity of the system. In this paper, three such
client-cache algorithms are proposed. Performance results obtained from
simulations are provided and compared with the performance of servers
without using the client-caching algorithms.
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