Upgrading the service capacity of video-on-demand servers with memory buffer
Journal
Future Generation Computer Systems
Journal Volume
12
Journal Issue
6
Pages
565-577
Date Issued
1997
Author(s)
Abstract
In this paper, we propose a new approach to exploit semiconductor memory to upgrade the service capacity of video-on-demand systems. The basic idea behind this so-called Generalized Relay Mechanism is that if we can relay the data of frequently accessed programmes from one access request to another, then we can improve the service capacity of the system without requiring higher disk bandwidth. The design of the Generalized Relay Mechanism is aimed at optimizing allocation and trade-off of the memory resource and the disk bandwidth resource. A simulation-based study shows that the Generalized Relay Mechanism is a very competitive alternative in comparison with simply incorporating more hard disks. If compared with an intuitive approach of utilizing memory buffer that always fills up the memory with most frequently accessed programmes, the Generalized Relay Mechanism enjoys an advantage in terms of cost.
Other Subjects
Bandwidth; Buffer storage; Digital image storage; Magnetic disk storage; Resource allocation; Storage allocation (computer); Subscription television; Generalized relay mechanism; Service capacity; Video on demand systems; Semiconductor storage
Type
journal article
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