随着需要存储和处理的信息量的增加,更多的多媒体系统采用基于磁带的三级存储器作为主要存储设备.提出一种新的基于磁带库的多媒体数据库系统的存储框架.多媒体数据库系统包括多媒体服务器、协调控制服务器、快速交换网络和客户群四个部分.其中,多媒体服务器由多个多媒体服务节点构成,保存大量的多媒体文件.每个多媒体服务节点是一个带有本地内存和磁盘的PC机,并通过SCSI适配卡连接一个高性能的磁带库.所有多媒体服务节点并行为用户提交多媒体信息.这种机群结构,有利于应用各种并行算法优化系统资源使用,并且该系统的每个多媒体服务节点因为使用了成本较低的PC机,使得整个系统的成本远小于其它多媒体信息系统.%Given the present cost of memories and bandwidth requirements of large scale multimedia databases, hierarchical storage servers are becoming increasingly popular. An infrastructure of multimedia server cluster in local network based on tertiary storage is presented. The multimedia server system, called TSMS, consists of multimedia sever, control server, rapid switching network and client group. Multimedia server is composed of media nodes which have local memories and local disks, as well as tape libraries. All media nodes present multimedia information to users concurrently. Many parallel algorithms can be easily applied to this multimedia server cluster to optimize system resources utilization. An advantage of TSMS is that it has a lower cost than other multimedia systems.
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