Principles of delay-sensitive multimedia data storage retrieval
ACM Transactions on Information Systems (TOIS)
A file system for continuous media
ACM Transactions on Computer Systems (TOCS)
Disk scheduling in a multimedia I/O system
MULTIMEDIA '93 Proceedings of the first ACM international conference on Multimedia
Multimedia network file servers: multichannel delay-sensitive data retrieval
Multimedia Systems
Operating system support for a video-on-demand file service
Multimedia Systems
Channel allocation under batching and VCR control in video-on-demand systems
Journal of Parallel and Distributed Computing - Special issue on multimedia processing and technology
Dynamic batching policies for an on-demand video server
Multimedia Systems
Analysis and Optimization of Disk Storage Devices for Time-Sharing Systems
Journal of the ACM (JACM)
A generalized interval caching policy for mixed interactive and long video workloads
Readings in multimedia computing and networking
A Greedy-but-Safe Dynamic Scheduling Strategy for an Interactive Video-On-Demand Server
ICMCS '96 Proceedings of the 1996 International Conference on Multimedia Computing and Systems
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In the past, much emphasis has been given to the data throughput of VOD servers. In Interactive Video-on-Demand (IVOD) applications, such as digital libraries, service availability and response times are more visible to the user than the underlying data throughput. Data throughput is a measure of how efficiently resources are utilized. Higher throughput may be achieved at the expense of deteriorated user-perceived performance metrics such as probability of admission and queuing delay prior to admission. In this paper, we propose and evaluate a number of strategies to sequence the admission of pending video requests. Under different request arrival rates and buffer capacities, we measure the probability of admission, queueing delay and data throughput of each strategy. Results of our experiments show that simple hybrid strategies can improve the number of admitted requests and reduce the queuing time, without jeopardizing the data throughput. The techniques we propose are independent of the underlying disk scheduling techniques used. So, they can be employed to improve the user-perceived performance of VOD servers, in general.