The database configuration parameter LOGRETAIN must be set to RECOVERY prior to splitting the mirror if it is intended to be initialized as standby or mirror database.
如果打算将镜像初始化为备用数据库或镜像数据库，那么在分割镜像之前，必须将数据库配置参数LOGRETAIN设置为RECOVERY。
The pre splitting blasting, technical parameter, firing method and blasting effect of the project are introduced.
为确保边坡稳定，降低工程成本，采用了预裂爆破技术。
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