Restoring a Cluster Instance to a Point in Time

Precautions

• To use this function, contact customer service to apply for the corresponding permission.
• Only cluster instances of version 4.0 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.
• Data can be restored to a new instance or the original instance.
• 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.
• This function is restricted in the following scenarios: rename, collmod, user creation, user deletion, role creation, role deletion, and retryable writes. When a restricted scenario occurs, the incremental backup stops. After the next automated full backup, the incremental backup resumes.

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 cluster 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.
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.
8. On the displayed page, the 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 instance is independent from the original one.

     • You are recommended to deploy the restored 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 can be modified. For details, see Buying a Cluster Instance.
   • Restore to Original
     Check that the status of the instance on the Instances page is Restoring.

     

     • 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.