Migrate an RDS for MySQL instance across zones in the same region

Precautions

During the migration, the connection to your RDS instance remains unavailable for 30 seconds. Make sure that your application can be reconnected to your RDS instance after the migration. The main risks are as follows:

• The migration changes the virtual IP address. Therefore, we recommend that you use the connection address but not the IP address in your application to establish a connection.
• You must delete cached data on the client in a timely manner. Otherwise, data can be read but cannot be written.
• A change to the virtual IP address has temporary impact on the availability of DRDS. You must update and view the connection information on the DRDS console in a timely manner.
• A change to the virtual IP address has temporary impact on DMS and DTS, which automatically return to normal after the migration is complete.

Migration scenarios

Fees

This function is free of charge. No fee is charged even when you migrate an RDS instance from one zone to multiple zones.

Prerequisites

Instance types: MySQL 5.5, MySQL 5.6, MySQL 5.7 (with local SDDs) and MySQL 8.0 (with local SDDs).

Regions: This function is available only when the region where RDS instance is located consists of multiple zones. For more information about regions and zones, see Regions and zones.

Procedure

1. Log on to the RDS console.
2. In the upper-left corner, select the region where the target RDS instance is located.
3. Find the target RDS instance and click its ID.
4. In the Basic Information section of the Basic Information page, click Migrate Across Zones.
   
5. In the displayed dialog box, specify the destination zone, VSwitch, and migration time, and click OK.
   Note If you want to change the maintenance window, follow these steps:

   1. Click Change.
   2. In the Configuration Information section, specify the maintenance window and click Save.
   3. Refresh the page, and perform the migration again.

APIs