Alwayson 与 mirror

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--将主副本改为同步模式和自动故障转移，将其中一个辅助副本改为同步辅助副本和自动故障转移 

USE [master]
GO
ALTER AVAILABILITY GROUP [TESTDB5AG]
MODIFY REPLICA ON N‘SINGLE1‘ WITH (AVAILABILITY_MODE = SYNCHRONOUS_COMMIT)
GO
ALTER AVAILABILITY GROUP [TESTDB5AG]
MODIFY REPLICA ON N‘SINGLE1‘ WITH (FAILOVER_MODE = AUTOMATIC)
GO

USE [master]
GO
ALTER AVAILABILITY GROUP [TESTDB5AG]
MODIFY REPLICA ON N‘SINGLE2‘ WITH (AVAILABILITY_MODE = SYNCHRONOUS_COMMIT)
GO
ALTER AVAILABILITY GROUP [TESTDB5AG]
MODIFY REPLICA ON N‘SINGLE2‘ WITH (FAILOVER_MODE = AUTOMATIC)
GO

--节点接管 同步辅助副本上 执行接管操作，如single2上
ALTER AVAILABILITY GROUP [TESTDB5AG] FAILOVER;

Alwayson 与 mirror

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原文地址：http://www.cnblogs.com/justdba/p/5641383.html