Restoring a DB Instance to a Point in Time

Scenarios

You can use an automated backup to restore a DB instance to a specified point in time.

RDS for PostgreSQL supports restoration to a new, the original, or an existing DB instance.

Constraints

• If you restore backup data to a new DB instance:
  • The DB engine, version, and port number of the database are the same as those of the original DB instance and cannot be changed.
  • You need to set a new administrator password.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and select a region and a project.
3. Click Service List. Under Database, click Relational Database Service. The RDS console is displayed.
4. On the Instance Management page, click the target DB instance.
5. In the navigation pane on the left, choose Backups & Restorations. On the displayed page, click Restore to Point in Time.
6. Select a restoration date and time range, enter a time point within the selected time range, and select a restoration method. Then, click OK.
   • Create New Instance
     The Create New Instance page is displayed.

     • The DB engine and version of the new DB instance are the same as those of the original DB instance and cannot be changed.
     • Storage space of the new DB instance is the same as that of the original DB instance by default and cannot be less than that of the original DB instance. The administrator password needs to be reset.
     • Other settings are the same as those of the original DB instance by default and can be modified. For details, see section Step 1: Create a DB Instance.

   • Restore to Original
     

     Restoring to the original DB instance will overwrite all existing data and the DB instance will be unavailable during the restoration process.

   • Restore to Existing
     

     • Restoring to an existing DB instance will overwrite data on it and cause the existing DB instance to be unavailable.
     • To restore backup data to an existing DB instance, the selected DB instance must be in the same VPC as the original DB instance and must have the same DB engine and the same or later version than the original DB instance.
     • Ensure that the storage space of the selected DB instance is greater than or equal to the storage space of the original DB instance. Otherwise, data will not be restored.

     Select an existing DB instance and click OK.

7. View the restoration result. The result depends on which restoration method was selected:
   • Create New Instance

     A new DB instance is created using the backup data. The status of the DB instance changes from Creating to Available.

     The new DB instance is independent from the original one. If you need read replicas to offload read pressure, create one or more for the new DB instance.

   • Restore to Original

     On the Instance Management page, the status of the DB instance changes from Restoring to Available.

     A new restoration time range is available. There will be a difference between the new and original time ranges. This difference reflects the duration of the restoration.

   • Restore to Existing

     On the Instance Management page, the status of the DB instance changes from Restoring to Available.

   After the restoration, the system will perform a full backup.