多路视频监控系统的存储调度策略

Store Management Scheme of a Multi-channel Video Surveillance

采用传统的“轮巡式”视频监控系统在多路存储情况下,存在着存储的效率低下、因硬盘空间不足改变存储路径而造成的存储“抖动”等问题。该文介绍了旨在提高多路存储效率的多磁盘存储调度算法和解决“抖动”问题的存储预分配算法及其设计思路和实现方法。实际应用表明,多磁盘存储调度算法能够很好地利用多硬盘大容量的特点,根据各个硬盘的容量和被访问的次数,将多路存储“平均”分配于多个硬盘中,充分提高存储访问的效率,并通过资源预约方式、预分配算法很好地解决了存储“抖动”问题。

The storage dithering occurs for a multi-channel video surveillance system with a traditional loop-testing mode when one hard disk space is not enough and the storage path changes.This paper introduces a storage manage-ment method of multiple hard disks and a storage pre-allotting way for eliminating the storage dithering.Experiments show that the disk management method can improve the access to the disks efficiently and the pre-allotting method can eliminate the storage dithering.