一种多点容灾系统的设计与实现*

设计并实现了一种多点容灾系统。主数据中心的数据通过本地高速网络同步地在本地备份中心备份，并通过Internet异步地在多个远程备份中心备份。主数据中心的写请求同步地在本地备份中心提交，并经过缓存、差错检测后异步地在多个远程备份中心重放。灾难发生时，可从多个备份点对主数据中心进行恢复。该系统具有可靠性高、费用低廉、备份距离远、容灾能力强等优点。

Design and implementation of multi point disaster tolerant system

This paper designed and implemented a multi-point disaster tolerant system.The primary data center was synchronously backuped in local backup center via local stable high-speed network,and was asynchronously backuped in multiple remote backup centers via Internet.Write requests in the primary data center synchronously submitted in local backup center,and they replayed in every remote backup center after being cached and error detected.When disasters happened,the primary data center could be recovered from multiple backup centers.This system has high reliability,low cost,far backup distance,and strong ability of disaster tolerant.