Operation Scenarios

TencentDB for SQL Server supports migrating data from a CVM-based self-created SQL Server database to a TencentDB for SQL Server instance. This document describes how to configure and run such a migration task.

• Before migration, please make sure that the SQL Server version of the target instance is not below that of the source instance.
• For the .bak files used for migration, please make sure that each .bak file contains only one database.
• The name of the migrated database cannot be the same as that of the TencentDB for SQL Server instance.

Directions

Step 1. Create a migration task

1. Log in to the TencentDB for SQL Server Console and select Data Transfer on the left sidebar.
2. Click Create Task, enter the task name, source database information, and target database information, and select CVM-based self-created SQL Server database as the source instance type.
   
3. After clicking Next, you need to configure the source SQL Server instance first and then configure the migration task.

   If the error message "Source instance info checking failed!" is displayed, please check the following items for troubleshooting:

   • Whether the sa account of the source SQL Server instance exists.
   • Whether the sa account password of the source SQL Server instance is correct.
   • Whether the IP and port connectivity of the source SQL Server instance work properly.

Step 2. Configure the source SQL Server instance

1. Enable the sa account for the source SQL Server instance.

2. Select Allow remote connections to this server in Connections and set a reasonable remote query timeout period.

3. Select SQL Server and Windows authentication mode in Security.

4. Enable TCP/IP.

5. Enable the built-in account and select localsystem.

6. Allow SQL Server port communication and open port 445 (for the basic network) or 49001 (for a VPC) in Windows Firewall.

7. (Optional) If VPC is selected as the CVM Network, you need to configure the freeSSHd tool.

   1. Download and install freeSSHd with the default options and agree to start the freeSSHd service.
   2. Double-click the freeSSHd icon on the desktop. Then, right-click the freeSSHd icon in the taskbar to open the Settings page for configuration.
   3. Select the SSH tab and set the port to 49001 (the default port here is 22, which should be changed to 49001).
   4. Select the Server status tab and start the SSH server.
   5. Select the Authentication tab and select Allowed for password authentication.
   6. Select the Users tab and enter the user tencent_vpc_migrate (this username cannot be changed) and the password tencent_vpc_migrate (this password cannot be changed) as shown below:
      
   7. Use D:\dbbackup\ (this path cannot be changed) as the backup folder used during SQL Server migration. Select the SFTP tab and configure this path as the "SFTP home path".

Step 3. Configure the migration task

Select the migration type, set the database (by selecting the databases/tables to be migrated), and click Save and Verify. If the verification fails, you can troubleshoot as prompted.

Step 4. Start the migration task

After the task is created, return to the task list. At this point, the task status is Initializing. Select the task and click Start to sync the task.

Step 5. Complete the migration task

After the data synchronization is completed (i.e., the progress bar shows 100%), you need to click Complete to end the synchronization process. If you selected Incremental Synchronization when configuring the migration task, you need to click Complete when the progress bar shows 99%. You can check whether the migration is successful on the Status.

• If the task status is *task successful, the data migration is successful.
• If the status is *task failed, the data migration failed. Please check the failure information, fix it accordingly, and then migrate again.