浅谈信息化建设中的容灾问题

随着计算机与网络技术的飞速发展，容灾已经成为信息数据中心建设的热门课题，容灾技术也快速发展起来。但由于容灾方案的技术复杂性和多样性，一般用户很难搞清其中的优劣。为此，从容灾的等级以及技术指标出发，论述容灾中用到的存储区域网络技术、基于SAN的互连、远程复制技术，以及现流行的CDP（持续数据保护）等技术；同时．对主机型远程容灾、存储型异地容灾、虚拟化容灾和CDP连续数据保护容灾解决方案进行对比，从而合理规划和选择适合自己业务特点的容灾解决方案。

Disaster Recovery in the Construction of Information System

With the rapid development of computer and network technologies, Disaster Recovery （DR） has become a hot topic of data center construction and DR technology has gained fast improvement. How- ever, due to the technical complexity and diversity of DR solutions, it is difficult for ordinary users to dis- tinguish its advantages and disadvantages. Starting with DR grades and technical parameters, we dis- cussed the storage area network technology, SAN-based interconnection, remote replication technology, and currently popular continuous data protection （CDP） technology and so on. Meanwhile, we also made comparision between host -based long-distance DR, storage remote DR, virtualized DR and CDP DR solutions in order to design a reasonable solution of disaster recovery suitable for one business.