Performance Study

An initial version of the distributed multimedia database prototype has been established, with one server on top of an object-oriented database system to manage video streams and another server on top of file systems to manage audio and slides streams.

Two additional servers are being built.

We have developed an initial multimedia data presentation tool on top of this distributed multimedia database environment to facilitate clients access to multiple media sources at different server sites. Initial performance analysis have been conducted which provide input to this proposal.

More comprehensive performance analysis of the system will be undertaken to evaluate the behavior of the interactive presentation tools and the end-to-end transmission control method.

Experiments will be conducted to measure the QoS parameters and effects of various user interactions on the system. The effects of multiple user accesses and delay recovery will be incorporated in these experiments.

The major experimentation activities are listed below:

  
Examine the effects of various QoS parameters as well as user interactions on the performance of presentation scheduling algorithms. Determine the appropriate QoS parameters for educational learning and training applications.
Conduct a full examination of the proposed multi-level buffer and feedback control and determine the appropriate parameters for implementing the approaches. 
  Evaluate the performance of the synthesized implementation and use the results to fine-tune the proposed interactive presentation techniques.
  The results of the above experiments will help us to provide various important QoS parameters to be used for educational learning and training applications. We will acquire first-hand experience on the behavior of the proposed approaches. In addition, we will also conduct objective evaluation through surveys of student reaction on using the learning tools.

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