A policy that defines how the service retains backups.
The type of HSM to use in the cluster. Currently the only allowed value is
The identifier (ID) of the cluster backup to restore. Use this value to restore the cluster from a backup instead of creating a new cluster. To find the backup ID, use DescribeBackups.
The identifiers (IDs) of the subnets where you are creating the cluster. You must specify at least one subnet. If you specify multiple subnets, they must meet the following criteria:
All subnets must be in the same virtual private cloud (VPC).
You can specify only one subnet per Availability Zone.
Tags to apply to the CloudHSM cluster during creation.