Abstract: A novel approach to achieve high surveillance video storage performance via commodity SATA disks is introduced to meet the storage requirements of network video surveillance applications.The solution uses fixed-size files and manages structured and unstructured data separately to resolve the disk fragment problem thoroughly.It employs an adaptive buffering strategy，which regularizes and schedules the accesses to disks efficiently.It also implements features such as fault-tolerance and scalability.Performance analysis shows that the solution can carry out 256 ways of D1 or 512 ways of CIF video streams with one commodity computer setup.

Key words: video surveillance, video storage, disk fragmentation, fixed-size files

摘要： 通过分析网络视频监控应用中的存储需求特点，提出了一种采用低成本SATA硬盘的高性能存储解决方案。该方案使用定长文件，并将结构化与非结构化数据分别存储和检索，彻底克服了传统解决方案中磁盘碎片导致存储性能下降的问题。该方案还采用了自适应的缓冲技术，对磁盘访问进行了有效的规整和调度，充分利用了磁盘的写入带宽。此外，该方案还实现了容错、扩展等重要功能。性能分析显示，该方案在普通计算机和SATA磁盘上能够同时记录256路D1或512路CIF视频数据流。

关键词: 视频监控, 视频存储, 磁盘碎片, 定长文件