Modelling rate-based dynamic cache sharing for distributed VOD systems

• Published in: Information Technology: 2000 International Symposium on Coding and Computing pp. 489 - 494
• Main Authors: Sonah, B., Ito, M.R.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2000
• Subjects: Collision mitigation; Computer science; Electrical capacitance tomography; Electronic switching systems; History; Indium tin oxide; Motion pictures; Real time systems; User interfaces; Video sharing
• ISBN: 9780769505404; 0769505406
• DOI: 10.1109/ITCC.2000.844275

A distributed VOD system includes several VOD sub-systems, each VOD sub-system consisting of an archive server (AS), a continuous media server (CMS) and a medata DB. A VOD sub-system employs an object replacement algorithm by which a video is selected to be replaced by a new video. Upon a miss, the VOD system must decide onto which CMS to load the new video. We address this issue by modelling a dynamic approach of logically sharing the overall CMS cache space among the CMSs based on the current average arrival rate of requests at each VOD sub-system to achieve superior cache performance. Our simulation results show that dynamic cache sharing is a means by which the hit performance at the CMSs can be improved.