PromoteReadReplica - Amazon Relational Database Service


Promotes a read replica DB instance to a standalone DB instance.

  • Backup duration is a function of the amount of changes to the database since the previous backup. If you plan to promote a read replica to a standalone instance, we recommend that you enable backups and complete at least one backup prior to promotion. In addition, a read replica cannot be promoted to a standalone instance when it is in the backing-up status. If you have enabled backups on your read replica, configure the automated backup window so that daily backups do not interfere with read replica promotion.

  • This command doesn't apply to Aurora MySQL, Aurora PostgreSQL, or RDS Custom.

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.


The DB instance identifier. This value is stored as a lowercase string.


  • Must match the identifier of an existing read replica DB instance.

Example: mydbinstance

Type: String

Required: Yes


The number of days for which automated backups are retained. Setting this parameter to a positive number enables backups. Setting this parameter to 0 disables automated backups.

Default: 1


  • Must be a value from 0 to 35.

  • Can't be set to 0 if the DB instance is a source to read replicas.

Type: Integer

Required: No


The daily time range during which automated backups are created if automated backups are enabled, using the BackupRetentionPeriod parameter.

The default is a 30-minute window selected at random from an 8-hour block of time for each AWS Region. To see the time blocks available, see Adjusting the Preferred Maintenance Window in the Amazon RDS User Guide.


  • Must be in the format hh24:mi-hh24:mi.

  • Must be in Universal Coordinated Time (UTC).

  • Must not conflict with the preferred maintenance window.

  • Must be at least 30 minutes.

Type: String

Required: No

Response Elements

The following element is returned by the service.


Contains the details of an Amazon RDS DB instance.

This data type is used as a response element in the operations CreateDBInstance, CreateDBInstanceReadReplica, DeleteDBInstance, DescribeDBInstances, ModifyDBInstance, PromoteReadReplica, RebootDBInstance, RestoreDBInstanceFromDBSnapshot, RestoreDBInstanceFromS3, RestoreDBInstanceToPointInTime, StartDBInstance, and StopDBInstance.

Type: DBInstance object


For information about the errors that are common to all actions, see Common Errors.


DBInstanceIdentifier doesn't refer to an existing DB instance.

HTTP Status Code: 404


The DB instance isn't in a valid state.

HTTP Status Code: 400



This example illustrates one usage of PromoteReadReplica.

Sample Request ?Action=PromoteReadReplica &BackupRetentionPeriod=7 &DBInstanceIdentifier=mysqldb-rr &SignatureMethod=HmacSHA256 &SignatureVersion=4 &Version=2014-10-31 &X-Amz-Algorithm=AWS4-HMAC-SHA256 &X-Amz-Credential=AKIADQKE4SARGYLE/20140428/us-east-1/rds/aws4_request &X-Amz-Date=20140428T221536Z &X-Amz-SignedHeaders=content-type;host;user-agent;x-amz-content-sha256;x-amz-date &X-Amz-Signature=c0b2cfc3db8334b6ef86922f664e05ab306754e30e408d9fd3c8e58069a9b386

Sample Response

<PromoteReadReplicaResponse xmlns=""> <PromoteReadReplicaResult> <DBInstance> <BackupRetentionPeriod>0</BackupRetentionPeriod> <DBInstanceStatus>modifying</DBInstanceStatus> <MultiAZ>false</MultiAZ> <VpcSecurityGroups/> <DBInstanceIdentifier>mysqldb-rr</DBInstanceIdentifier> <PreferredBackupWindow>08:25-08:55</PreferredBackupWindow> <PreferredMaintenanceWindow>fri:04:50-fri:05:20</PreferredMaintenanceWindow> <StatusInfos> <DBInstanceStatusInfo> <Status>replicating</Status> <StatusType>read replication</StatusType> <Normal>true</Normal> </DBInstanceStatusInfo> </StatusInfos> <AvailabilityZone>us-east-1a</AvailabilityZone> <ReadReplicaDBInstanceIdentifiers/> <Engine>mysql</Engine> <PendingModifiedValues> <BackupRetentionPeriod>7</BackupRetentionPeriod> </PendingModifiedValues> <LicenseModel>general-public-license</LicenseModel> <DBParameterGroups> <DBParameterGroup> <ParameterApplyStatus>in-sync</ParameterApplyStatus> <DBParameterGroupName>default.mysql5.6</DBParameterGroupName> </DBParameterGroup> </DBParameterGroups> <Endpoint> <Port>3306</Port> <Address></Address> </Endpoint> <EngineVersion>5.6.13</EngineVersion> <ReadReplicaSourceDBInstanceIdentifier>mysqldb</ReadReplicaSourceDBInstanceIdentifier> <OptionGroupMemberships> <OptionGroupMembership> <OptionGroupName>default:mysql-5-6</OptionGroupName> <Status>in-sync</Status> </OptionGroupMembership> </OptionGroupMemberships> <PubliclyAccessible>true</PubliclyAccessible> <DBSecurityGroups> <DBSecurityGroup> <Status>active</Status> <DBSecurityGroupName>default</DBSecurityGroupName> </DBSecurityGroup> </DBSecurityGroups> <AutoMinorVersionUpgrade>true</AutoMinorVersionUpgrade> <DBName>mysqldb</DBName> <InstanceCreateTime>2014-04-25T17:12:34.460Z</InstanceCreateTime> <AllocatedStorage>100</AllocatedStorage> <DBInstanceClass>db.m1.medium</DBInstanceClass> <MasterUsername>myawsuser</MasterUsername> </DBInstance> </PromoteReadReplicaResult> <ResponseMetadata> <RequestId>8e8c0d64-be21-11d3-a71c-13dc2f771e41</RequestId> </ResponseMetadata> </PromoteReadReplicaResponse>

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: