**To create a DB instance read replica** This example creates a read replica of an existing DB instance named ``test-instance``. The read replica is named ``test-instance-repl``. :: aws rds create-db-instance-read-replica \ --db-instance-identifier test-instance-repl \ --source-db-instance-identifier test-instance Output:: { "DBInstance": { "IAMDatabaseAuthenticationEnabled": false, "MonitoringInterval": 0, "DBInstanceArn": "arn:aws:rds:us-east-1:123456789012:db:test-instance-repl", "ReadReplicaSourceDBInstanceIdentifier": "test-instance", "DBInstanceIdentifier": "test-instance-repl", ...some output truncated... } }