[AlwaysOn] 創建SQL Server高可用性組T-SQL語法：BACKUP_PRIORITY參數

BACKUP_PRIORITY = n

指定此副本相對于同一可用性組中的其他副本執行備份的優先級。Specifies your priority for performing backups on this replica relative to the other replicas in the same availability group. 該值是0到100之間的整數。The value is an integer in the range of 0..100. 這些值具有以下含義：These values have the following meanings:

l   1 到100表示可以選擇可用性副本執行備份。1..100 indicates that the availability replica could be chosen for performing backups. 1表示最低優先級，100表示最高優先級。1 indicates the lowest priority, and 100 indicates the highest priority. 如果備份優先級設置為1，那么只有在當前沒有更高優先級的可用性副本可用時，才選擇該可用性副本來執行備份。If BACKUP_PRIORITY = 1, the availability replica would be chosen for performing backups only if no higher priority availability replicas are currently available.

l   表示此可用性副本不用于執行備份。0 indicates that this availability replica is not for performing backups. 例如，對于您從不希望備份故障轉移到的遠程可用性副本，這很有用。This is useful, for example, for a remote availability replica to which you never want backups to fail over.

有關詳細信息，請參閱活動輔助副本：輔助副本上的備份(始終在可用性組上)。For more information, see Active Secondaries: Backup on Secondary Replicas (Always On Availability Groups).