    # File lib/fog/aws/requests/rds/create_db_instance_read_replica.rb, line 35
            def create_db_instance_read_replica(instance_identifier, source_identifier, options={})
              # TODO: throw error when instance_identifier already exists,
              # or source_identifier doesn't exist

              source = self.data[:servers][source_identifier]
              data = {
                'AllocatedStorage' => source['AllocatedStorage'],
                'AutoMinorVersionUpgrade' => options.key?('AutoMinorVersionUpgrade') ? options['AutoMinorVersionUpgrade'] : true,
                'AvailabilityZone' => options['AvailabilityZone'],
                'DBInstanceClass' => options['DBInstanceClass'] || 'db.m1.small',
                'DBInstanceIdentifier' => instance_identifier,
                'DBInstanceStatus' => 'creating',
                'DBName' => source['DBName'],
                'DBParameterGroups' => source['DBParameterGroups'],
                'DBSecurityGroups' => source['DBSecurityGroups'],
                'Endpoint' => {},
                'Engine' => source['Engine'],
                'EngineVersion' => options['EngineVersion'] || '5.5.12',
                'InstanceCreateTime' => nil,
                'LatestRestorableTime' => nil,
                'LicenseModel' => 'general-public-license',
                'MasterUsername' => source['MasterUsername'],
                'MultiAZ' => false,
                'PendingModifiedValues' => {},
                'PreferredBackupWindow'=> '08:00-08:30',
                'PreferredMaintenanceWindow'=> "mon:04:30-mon:05:00",
                'ReadReplicaDBInstanceIdentifiers'=> [],
                'ReadReplicaSourceDBInstanceIdentifier'=> source_identifier
              }
              self.data[:servers][instance_identifier] = data
              self.data[:servers][source_identifier]['ReadReplicaDBInstanceIdentifiers'] << instance_identifier

              response = Excon::Response.new
              response.body = {
                "ResponseMetadata"=>{ "RequestId"=> Fog::AWS::Mock.request_id },
                "CreateDBInstanceReadReplicaResult"=> {"DBInstance"=> data}
              }
              response.status = 200
              # This values aren't showed at creating time but at available time
              self.data[:servers][instance_identifier]["InstanceCreateTime"] = Time.now

              response
            end