“军卫一号”HIS的高可靠性体系结构设计与比较

目的：为提高HIS核心数据库服务器系统的可靠性，提出改进服务器系统结构的方案。方法：设计、分析基于共享存储的双机热备系统、基于独立存储的双机热备系统、基于独立存储的全冗余系统的服务器体系结构。结果：采用小型机替代PCServer．磁盘阵列的数据存储方式由SAN替代RAID-5，并通过镜像复制备份的解决方案实现数据的实时热备份。增加了系统的可靠性及数据的安全性。结论：基于独立存储的全冗余系统结构，能有效地提高“军卫一号”HIS系统的可靠性。

Design on High-Reliability Key Hospital Database Server System of"No.1 Millitary Medical Project"

Objective To improve the reliability of the core database system by ameliorating the scheme of the server system architecture. Methods Combined with practice of the hospital informatization, the security and potential hole of the database server system were analyzed and evaluated. Results Aimed to deal with the security hidden-trouble, a mini-server was adopted instead of PC server, while SAN（Storage Area Network） was utilized instead of RAID-5, and mirror copy technique was used to implement the real-time hot copy of the data. Conclusion Consequently the reliability of the system has been greatly improved.