摘要： 本文介绍了在网状型数据库IDMS上实现的安全技术和恢复数据库的过程。IDMS用数据字典控制系统产品的存取,用子模式控制数据的存取,使数据库不被非法用户使用。热启动是IDMS的特色之一,在CV下它能自动地、迅速地恢复受到系统故障影响的运行单位。该功能将故障的影响控制在最小范围。

Abstract: In this article, the security and recovery techniques are introduced, which are implemented on a network data base-IDMS. Under IDMS, the access to system products is controled by means of a data dictionary, and data access is controled by subscheme, so as to protect IDMS data base accessed from unauthorized users. The warm start is one of the features of IDMS. Under central version, it can automatically and rapidly recover a recovery unit to the normal status that it was before the system fault. The fault effect is reduced to a minimum.