sourceDbClusterIdentifier

The identifier of the Multi-AZ DB cluster that will act as the source for the read replica. Each DB cluster can have up to 15 read replicas. Constraints:

• Must be the identifier of an existing Multi-AZ DB cluster.

• Can't be specified if the `SourceDBInstanceIdentifier` parameter is also specified.

• The specified DB cluster must have automatic backups enabled, that is, its backup retention period must be greater than 0.

• The source DB cluster must be in the same AWS-Region as the read replica. Cross-Region replication isn't supported.