Rename a computer that hosts a stand-alone instance of SQL Server

Applies to: SQL Server - Windows only

When you change the name of the computer that is running SQL Server, the new name is recognized during SQL Server startup. You don't have to run Setup again to reset the computer name. Instead, use the following steps to update system metadata that is stored in sys.servers and reported by the system function @@SERVERNAME. Update system metadata to reflect computer name changes for remote connections and applications that use @@SERVERNAME, or that query the server name from sys.servers.

The following steps can't be used to rename an instance of SQL Server. They can be used only to rename the part of the instance name that corresponds to the computer name. For example, you can change a computer named MB1 that hosts an instance of SQL Server named Instance1 to another name, such as MB2. However, the instance part of the name, Instance1, remains unchanged. In this example, the \\<ComputerName>\<InstanceName> would be changed from \\MB1\Instance1 to \\MB2\Instance1.

Prerequisites

Before you begin the renaming process, review the following information:

• When an instance of SQL Server is part of a SQL Server failover cluster, the computer renaming process differs from a computer that hosts a stand-alone instance. For more information, see Rename a SQL Server Failover Cluster Instance.

• SQL Server doesn't support renaming computers that are involved in replication, except when you use log shipping with replication. The secondary computer in log shipping can be renamed if the primary computer is permanently lost. For more information, see Log Shipping and Replication (SQL Server).

• When you rename a computer that is configured to use Reporting Services, Reporting Services might not be available after the computer name change. For more information, see Rename a Report Server Computer.

• When you rename a computer that is configured to use database mirroring, you must turn off database mirroring before the renaming operation. Then, re-establish database mirroring with the new computer name. Metadata for database mirroring isn't updated automatically to reflect the new computer name. Use the following steps to update system metadata.

• Users who connect to SQL Server through a Windows group that uses a hard-coded reference to the computer name might not be able to connect to SQL Server. This issue can occur after the rename if the Windows group specifies the old computer name. To ensure that such Windows groups have SQL Server connectivity following the renaming operation, update the Windows group to specify the new computer name.

You can connect to SQL Server by using the new computer name after you restart SQL Server. To ensure that @@SERVERNAME returns the updated name of the local server instance, you should manually run the following procedure that applies to your scenario. The procedure you use depends on whether you're updating a computer that hosts a default or named instance of SQL Server.

Rename a computer that hosts a stand-alone instance of SQL Server

• For a renamed computer that hosts a default instance of SQL Server, run the following procedures:

  SQL

  EXEC sp_dropserver '<old_name>';
  GO
  EXEC sp_addserver '<new_name>', local;
  GO
  

  Restart the instance of SQL Server.

• For a renamed computer that hosts a named instance of SQL Server, run the following procedures:

  SQL

  EXEC sp_dropserver '<old_name\instancename>';
  GO
  EXEC sp_addserver '<new_name\instancename>', local;
  GO
  

  Restart the instance of SQL Server.

After the rename operation

After a computer is renamed, any connections that used the old computer name must connect by using the new name.

Verify rename operation

• Select information from either @@SERVERNAME or sys.servers. The @@SERVERNAME function returns the new name, and the sys.servers table shows the new name. The following example shows the use of @@SERVERNAME.

  SQL

  SELECT @@SERVERNAME AS 'Server Name';
  

Additional considerations

Remote logins

If the computer has any remote logins, running sp_dropserver might generate an error similar to the following output:

Output

Server: Msg 15190, Level 16, State 1, Procedure sp_dropserver, Line 44 There are still remote logins for the server 'SERVER1'.

To resolve the error, you must drop remote logins for this server.

• For a default instance, run the following procedure:

  SQL

  EXEC sp_dropremotelogin old_name;
  GO
  

• For a named instance, run the following procedure:

  SQL

  EXEC sp_dropremotelogin old_name\instancename;
  GO
  

Linked server configurations

The computer renaming operation affects linked server configurations. Use sp_addlinkedserver or sp_setnetname to update computer name references. For more information, see the sp_addlinkedserver or sp_setnetname.

Client alias names

The computer renaming operation affects client aliases that use named pipes. For example, if an alias PROD_SRVR was created to point to SRVR1 and uses the named pipes protocol, the pipe name looks like \\SRVR1\pipe\sql\query. After the computer is renamed, the path of the named pipe will no longer be valid. For more information about named pipes, see the Creating a Valid Connection String Using Named Pipes.

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