title: Create daily temporary clone of Aurora cluster
body: <p>I want to create a temporary clone of my Aurora MySQL cluster to run daily ETLs (to make sure it doesn't affect the other services) and then terminate it once the ETLs are done.</p>
  
  <pre><code>import boto3
  
  client = boto3.client('rds')
  
  old_cluster_identifier = 'test-etl'
  new_cluster_identifier = 'test-etl-clone'
  
  response = client.restore_db_cluster_to_point_in_time(
      DBClusterIdentifier=new_cluster_identifier,
      RestoreType='copy-on-write',
      SourceDBClusterIdentifier=old_cluster_identifier,
      UseLatestRestorableTime=True,
      Port=3306,
      DBSubnetGroupName='test-etl',
      VpcSecurityGroupIds=[
          'sg-xxxx',
      ],
      Tags=[],
      EnableIAMDatabaseAuthentication=False,
      BacktrackWindow=0,
      DeletionProtection=False,
      CopyTagsToSnapshot=False
  )
  
  reader_endpoint = response['DBCluster']['ReaderEndpoint']
  
  response2 = client.create_db_instance(
      DBInstanceClass='db.t2.medium',
      Engine='aurora',
      DBClusterIdentifier=new_cluster_identifier,
      DBInstanceIdentifier=new_cluster_identifier + '-instance-1',
  )
  
  print(response2)
  </code></pre>
  
  <p>This code works well for me but then when I want to delete the clone cluster from the console, I just click on the instance name / Actions / Delete and this deletes at the same time both the instance and the cluster.</p>
  
  <p>I tried to find the equivalent in the AWS SDK but if I run the function delete_db_instance() it only deletes the instance and keeps the cluster on with status 'available' so I have to do:
  - delete_db_instance('test-etl-clone-instance-1')
  - wait until it is deleted
  - delete_db_cluster('test-etl-clone')</p>
  
  <p>Is there a way to delete both at the same time directly?</p>
  
  <p>Or can I just have the cloned cluster always available without any instance running and just create/delete a new instance everyday? I'm not sure there are additional costs if I just have the cluster without any instance and if the data will be up-to-date or not when I create a new instance the next day.</p>
  
  <p>Thanks</p>