Restoring a Replica Set Instance to a Point in Time

Precautions

• Currently, you can restore a replica set instance to a new or original DB instance at a point in time.
• Only replica set instances of versions 4.0, 4.2, and 4.4 can be restored to a point in time.
• Data can be restored to a specific point in time only after the automated backup policy is enabled.
• The local database is not included in the databases that can be restored to a specified time point.
• To ensure data security, the dropDatabase operation is blocked when the incremental backup is restored to a point in time. Empty databases or views may exist after the restoration. You can delete them.
• Only whitelisted users can use this function. You need to submit a service ticket to apply for this function. In the upper right corner of the management console, choose Service Tickets > Create Service Ticket to submit a service ticket.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and select a region and a project.
3. Click in the upper left corner of the page and choose Databases > Document Database Service.
4. On the Instances page, click the replica set instance name.
5. In the navigation pane on the left, choose Backups & Restorations.
6. On the Backups & Restorations page, click Restore to Point in Time.
   Figure 1 Restoring to a point in time
   

7. Select the date and time range, select or enter a time point within the acceptable range, and select Create New Instance or Restore to Original.
   Figure 2 Restoring to a point in time
   

8. On the displayed page, the DB instance is restored based on the restoration method you selected in 7.
   • Create New Instance

     The Create New Instance page is displayed for you to create an instance using the backup data. The new DB instance is independent from the original one.

     • You are recommended to deploy the restored DB instance in a different AZ to ensure that applications will not be adversely affected by the failure in any single AZ.
     • The database type, DB instance type, compatible MongoDB version, storage engine, and storage type must be the same as those of the original and cannot be changed.
     • The storage space is the same as that of the original instance by default. You can increase the storage space, but you cannot reduce it.
     • Other settings have default values and can be modified. For details, see Buying a Replica Set Instance.
   • Restore to Original
     

     • Restoring backup data to the original instance will overwrite existing data on the instance and cause the instance to be unavailable during the restoration. Exercise caution when performing this operation.
     • The administrator password of the instance remains unchanged after the restoration.
     • If the backup method is logical backup, the backup cannot be restored to the original instance.

     Check that the status of the DB instance on the Instances page is Restoring.