SQL Server 管理員專用連線(DAC)

env: all SQL Server

Dedicated Administrator Connection (DAC) : 管理員專用連線
 1.預設只偵聽127.0.0.1上的1434埠
 2.sqlcmd連接
 command:請自行替換"ServerName"
 SQLCMD -E -S ServerName -A

 3.使用SSMS
 在 ServerName輸入"admin:ServerName\InstanceName"

DAC連線錯誤:
A connection was successfully established with the server, but then an error occurred during the login process. (provider: TCP Provider, error: 0 - The specified network name is no longer available.) (Microsoft SQL Server, Error: 64)

原因: 因為DAC允許一個連線，當下可能已經有其他連線。此錯誤也可以從SQL Server Errorlog看到。

開啟遠端DAC:

sp_configure 'remote admin connections', 1;

GO

RECONFIGURE;

GO