信息系统灾难恢复体系结构

灾难备份与恢复技术能够充分保证灾难发生时，信息系统仍能正常工作，目前已成为信息安全领域一个备受瞩目的研究方向。本文参考IBM公司SHARE78的7个灾难恢复等级，将灾难恢复系统分为数据级、系统级和应用级3个层次。根据这种层次划分，重新合理地定义了9个灾难恢复等级，并对各个等级详细地给出了定性的说明和定量的规定。本文提出了信息系统的灾难恢复体系结构，并用三维模型描述了灾难恢复指标、备份与恢复技术和灾难恢复计划与措施之间的关系，从而为信息系统的灾难恢复提供了一个完整的框架和解决方案。

Disaster Recovery Architecture of Information System

Disaster backup and recovery technology can efficiently ensure the information system to work normally when the disaster occurs, so it becomes a very important field in information security. In this paper, based on the 7 tiers of disaster recovery solutions defined by SHARE 78 of IBM,the disaster recovery system is partitioned into data level, system level and application level. According to these levels, the 9 tiers of disaster recovery solutions are redefined reasonably, and each of them is qualitatively explained and quantitatively prescribed. The disaster recovery architecture of the information system is presented, and the relation, among disaster recovery objects, backup and recovery technologies and disaster recovery plans and measures, is described in a three-dimensional model, in order to provide the whole disaster recovery framework and solution of the information system.