You can restore a DocumentDB cluster to a selected target availability zone and change the node type of the cluster during the restore.
You can restore a DocumentDB cluster from any of the following backups:
The most recent backup
A backup from a specified date and time
From the navigation pane, go to Protect > Databases.
The Instances page appears.
On the Instances tab, from the View list beside Instances, select Cloud DB.
The Instances page for cloud databases appears.
In the Actions column for the instance, click the action button , and then click Restore.
The Backup content page appears.
Select the backup to restore:
To restore the most recent backup, in the upper-right corner of the page, select Show latest backup.
To restore a backup from a specific date and time, in the upper-right corner of the page, select Show backup as of a specific date, and then select the backup.
To restore a backup from a date range, in the upper-right corner of the page, select Show backup for a date range, and then select the backup.
To restore a snapshot, click the region, and then select the snapshot that you want to restore.
The Restore options dialog box appears.
In the Cluster identifier box, type the identifier of the cluster that will be created from the snapshot. The identifier must not already exist within the region.
To change the compute and memory capacity of the instance, from the Instance class list in the Advanced section, select the instance class.
To define the subnet group, in the Subnet group box, type the subnet group. Specifying a subnet group may limit the choice of availability zones.
In the Number of instances box, type the number of instances to deploy.
To define which subnets and IP ranges the cluster or instance can use in the Amazon virtual private cloud (VPC), in the VPC security group IDs box, enter the names of the security group ID.
You can add multiple security groups, separated by commas. For example, you can enter "sg-1122,sg-3344".