Each memory block can have only one global backup.
每个内存块只能有一个全局备份。
In order to ensure that the global warehouse maintains a backup list of the customers with bad credit or bankruptcy records, the warehouse credit officer creates a local table named BAD_CUSTOMERS.
为了确保全球仓库维护一份有不良信用或破产记录的客户名单，仓库信用调查分析人员创建一个名为BAD_CUSTOMERS的本地表。
Metro Mirror is used to replicate to the first backup, and then Global Mirror is used to replicate from the first backup to a second backup.
MetroMirror用于对数据进行第一次备份，再由Global Mirror复制第一次备份作为第二次备份。
Metro Mirror is used to replicate to the first backup, and then Global Mirror is used to replicate from the first backup to a second backup.
MetroMirror用于对数据进行第一次备份，再由Global Mirror复制第一次备份作为第二次备份。
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