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2025-04-06 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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FAILOVER_MODE = {AUTOMATIC | MANUAL}
Specifies the failover mode of the availability copy to be defined. Specifies the failover mode of the availability replica that you are defining.
Automatic AUTOMATIC
Enable automatic failover. Enables automatic failover. This option is supported only if you also specify that the availability mode is synchronous commit mode. This option is supported only if you also specify AVAILABILITY_MODE = SYNCHRONOUS_COMMIT. You can specify automatic for two available replicas, including the master copy. You can specify AUTOMATIC for two availability replicas, including the primary replica.
Comment Note
SQL Server failover Cluster instance (FCI) does not support automatic failover by availability group, so you can only configure any availability copy hosted by FCI for manual failover. SQL Server Failover Cluster Instances (FCIs) do not support automatic failover by availability groups, so any availability replica that is hosted by an FCI can only be configured for manual failover.
Manual MANUAL
Enable manual failover scheduled by the database administrator or forced manual failover (commonly referred to as forced failover). Enables planned manual failover or forced manual failover (typically called forced failover) by the database administrator.
The FAILOVER_MODE clause is required. The FAILOVER_MODE clause is required. Two types of manual failover are supported under different conditions: manual failover without data loss and forced failover (which may lose data). The two types of manual failover, manual failover without data loss and forced failover (with possible data loss), are supported under different conditions. For more information, see failover and failover modes (always on availability groups). For more information, see Failover and Failover Modes (Always On Availability Groups).
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