主系统执行所有事务性工作，并将任何数据库更改复制到备用系统。
The primary system performs all transactional work and replicates any database changes to the standby.
为了在备用服务器上保持数据库的一个同步副本，系统会一致地将DB 2HADR日志文件从主要服务器发送到备用服务器来保持二者的同步。
To keep a synchronized copy of the database on the standby server, DB2 HADR log files are consistently sent from the primary to the standby to keep the two in sync.
如果源数据库变得不可用(例如，它崩溃了)，那么可以激活目标系统上的备用数据库，以供用户访问。
If the source database becomes unavailable (for example, if it crashes), the standby database on the target system can be activated for user access.
为了使用分割镜像作为备用数据库，必须在目标系统上执行以下步骤。
Here are the steps required on the target system to use a split mirror as a standby database.
该方案又把一主备用站地址库集成进系统之中，从而扩大了该设备的使用范围。
And also, this system design integrates the address storeroom of the main backup station into the whole system, thus enlarging the usable range of the equipment.
采用基因库进化策略，即将淘汰的记忆检测器送入基因库备用，提高记忆检测器利用率，避免生成大量无效的未成熟检测器而浪费系统计算时间。
Gene library evolution policies avoid wasting system calculation resources and enhance memory detectors 'utilization by delivering eliminated memory detectors to gene library for standby.
采用基因库进化策略，即将淘汰的记忆检测器送入基因库备用，提高记忆检测器利用率，避免生成大量无效的未成熟检测器而浪费系统计算时间。
Gene library evolution policies avoid wasting system calculation resources and enhance memory detectors 'utilization by delivering eliminated memory detectors to gene library for standby.
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