Restoring a DB Instance to a Point in Time

Scenarios

You can restore from automated backups to a specified point in time.

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

When you enter the time point that you want to restore the DB instance to, RDS downloads the most recent full backup file from OBS to the DB instance. Then, incremental backups are also restored to the specified point in time on the DB instance. Data is restored at an average speed of 30 MB/s.

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 the 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 the new instance must be at least as large as the original DB instance.
     • 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
     1. Select "I acknowledge that after I select Restore to Original, data on the original databases will be overwritten and the original DB instance will be unavailable during the restoration." and click Next.
     2. Confirm the information and click OK.
     

     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
     1. Select "I acknowledge that restoring to an existing DB instance will overwrite data on it and cause the existing DB instance to be unavailable during the restoration." and click Next.
     2. Confirm the information and click OK.
     

     • 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.

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.

     After the restoration is complete, a full backup will be automatically triggered.

   • 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 on the Restore to Point in Time page. There will be a difference between the new and original time ranges. This difference reflects the duration of the restoration.

     After the restoration is complete, a full backup will be automatically triggered.

   • Restore to Existing

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

     After the restoration is complete, a full backup will be automatically triggered.