备份的同时，实现读／写分离 拓扑结构： 数据库同步复制软件是实施关键系统灾备工程的一个重要组成部分，当生产系统出现异常或
备份的同时，实现读／写分离
拓扑结构：
数据库同步复制软件是实施关键系统灾备工程的一个重要组成部分，当生产系统出现异常或故障时，，备份系统的数据库能够完全代替生产系统的Oracle 数据库管理系统，以实现关键系统的正常运行。
充分利用投入的资源：
平时灾备数据库可以作为查询库来使用，方便的实现了读写分离，降低了主生产系统的压力。可以充分的把灾备资源利用起来，不至于浪费投入。
将查询、报表、统计等查询操作业务全部割接到备份数据库，主库只用于写操作。新写入的数据在三秒左右会同步到备份库。
读写分离的实现后，业务性能远远超过用户估计。
业务功能实现：
在关键业务应用系统的数据库上安装复制软件代理程序，通过代理程序获取数据库的交易，实现数据变化的实时跟踪。抓取的数据通过1000Mbps以太网进行实时传输，实现系统数据同步到备份系统上的实时传输。
技术实现：
复制软件是采用交易复制的方式进行数据同步；灾备数据库上的Oracle数据库处于OPEN状态，可提供实时数据访问。数据复制的时延可以控制在3秒左右；
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