ModifyReplicationInstance - AWS Database Migration Service


Modifies the replication instance to apply new settings. You can change one or more parameters by specifying these parameters and the new values in the request.

Some settings are applied during the maintenance window.

Request Syntax

{ "AllocatedStorage": number, "AllowMajorVersionUpgrade": boolean, "ApplyImmediately": boolean, "AutoMinorVersionUpgrade": boolean, "EngineVersion": "string", "MultiAZ": boolean, "NetworkType": "string", "PreferredMaintenanceWindow": "string", "ReplicationInstanceArn": "string", "ReplicationInstanceClass": "string", "ReplicationInstanceIdentifier": "string", "VpcSecurityGroupIds": [ "string" ] }

Request Parameters

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

The request accepts the following data in JSON format.


The amount of storage (in gigabytes) to be allocated for the replication instance.

Type: Integer

Required: No


Indicates that major version upgrades are allowed. Changing this parameter does not result in an outage, and the change is asynchronously applied as soon as possible.

This parameter must be set to true when specifying a value for the EngineVersion parameter that is a different major version than the replication instance's current version.

Type: Boolean

Required: No


Indicates whether the changes should be applied immediately or during the next maintenance window.

Type: Boolean

Required: No


A value that indicates that minor version upgrades are applied automatically to the replication instance during the maintenance window. Changing this parameter doesn't result in an outage, except in the case described following. The change is asynchronously applied as soon as possible.

An outage does result if these factors apply:

  • This parameter is set to true during the maintenance window.

  • A newer minor version is available.

  • AWS DMS has enabled automatic patching for the given engine version.

Type: Boolean

Required: No


The engine version number of the replication instance.

When modifying a major engine version of an instance, also set AllowMajorVersionUpgrade to true.

Type: String

Required: No


Specifies whether the replication instance is a Multi-AZ deployment. You can't set the AvailabilityZone parameter if the Multi-AZ parameter is set to true.

Type: Boolean

Required: No


The type of IP address protocol used by a replication instance, such as IPv4 only or Dual-stack that supports both IPv4 and IPv6 addressing. IPv6 only is not yet supported.

Type: String

Required: No


The weekly time range (in UTC) during which system maintenance can occur, which might result in an outage. Changing this parameter does not result in an outage, except in the following situation, and the change is asynchronously applied as soon as possible. If moving this window to the current time, there must be at least 30 minutes between the current time and end of the window to ensure pending changes are applied.

Default: Uses existing setting

Format: ddd:hh24:mi-ddd:hh24:mi

Valid Days: Mon | Tue | Wed | Thu | Fri | Sat | Sun

Constraints: Must be at least 30 minutes

Type: String

Required: No


The Amazon Resource Name (ARN) of the replication instance.

Type: String

Required: Yes


The compute and memory capacity of the replication instance as defined for the specified replication instance class. For example to specify the instance class dms.c4.large, set this parameter to "dms.c4.large".

For more information on the settings and capacities for the available replication instance classes, see Selecting the right AWS DMS replication instance for your migration.

Type: String

Required: No


The replication instance identifier. This parameter is stored as a lowercase string.

Type: String

Required: No


Specifies the VPC security group to be used with the replication instance. The VPC security group must work with the VPC containing the replication instance.

Type: Array of strings

Required: No

Response Syntax

{ "ReplicationInstance": { "AllocatedStorage": number, "AutoMinorVersionUpgrade": boolean, "AvailabilityZone": "string", "DnsNameServers": "string", "EngineVersion": "string", "FreeUntil": number, "InstanceCreateTime": number, "KmsKeyId": "string", "MultiAZ": boolean, "NetworkType": "string", "PendingModifiedValues": { "AllocatedStorage": number, "EngineVersion": "string", "MultiAZ": boolean, "NetworkType": "string", "ReplicationInstanceClass": "string" }, "PreferredMaintenanceWindow": "string", "PubliclyAccessible": boolean, "ReplicationInstanceArn": "string", "ReplicationInstanceClass": "string", "ReplicationInstanceIdentifier": "string", "ReplicationInstanceIpv6Addresses": [ "string" ], "ReplicationInstancePrivateIpAddress": "string", "ReplicationInstancePrivateIpAddresses": [ "string" ], "ReplicationInstancePublicIpAddress": "string", "ReplicationInstancePublicIpAddresses": [ "string" ], "ReplicationInstanceStatus": "string", "ReplicationSubnetGroup": { "ReplicationSubnetGroupDescription": "string", "ReplicationSubnetGroupIdentifier": "string", "SubnetGroupStatus": "string", "Subnets": [ { "SubnetAvailabilityZone": { "Name": "string" }, "SubnetIdentifier": "string", "SubnetStatus": "string" } ], "SupportedNetworkTypes": [ "string" ], "VpcId": "string" }, "SecondaryAvailabilityZone": "string", "VpcSecurityGroups": [ { "Status": "string", "VpcSecurityGroupId": "string" } ] } }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


The modified replication instance.

Type: ReplicationInstance object


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


AWS DMS was denied access to the endpoint. Check that the role is correctly configured.

HTTP Status Code: 400


There are not enough resources allocated to the database migration.

HTTP Status Code: 400


The resource is in a state that prevents it from being used for database migration.

HTTP Status Code: 400


The resource you are attempting to create already exists.

HTTP Status Code: 400


The resource could not be found.

HTTP Status Code: 400


The storage quota has been exceeded.

HTTP Status Code: 400


An upgrade dependency is preventing the database migration.

HTTP Status Code: 400



This example illustrates one usage of ModifyReplicationInstance.

Sample Request

POST / HTTP/1.1 Host: dms.<region>.<domain> x-amz-Date: <Date> Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=contenttype;date;host;user- agent;x-amz-date;x-amz-target;x-amzn- requestid,Signature=<Signature> User-Agent: <UserAgentString> Content-Type: application/x-amz-json-1.1 Content-Length: <PayloadSizeBytes> Connection: Keep-Alive X-Amz-Target: AmazonDMSv20160101.ModifyReplicationInstance { "ReplicationInstanceArn":"arn:aws:dms:us-east- 1:123456789012:rep:PWEBBEUNOLU7VEB2OHTEH4I4GQ", "AllocatedStorage":0, "NetworkType":"IPv4", "ApplyImmediately":true, "ReplicationInstanceClass":"dms.t2.small", "PreferredMaintenanceWindow":"", "EngineVersion":"", "AllowMajorVersionUpgrade":true, "AutoMinorVersionUpgrade":true, "ReplicationInstanceIdentifier":"" }

Sample Response

HTTP/1.1 200 OK x-amzn-RequestId: <RequestId> Content-Type: application/x-amz-json-1.1 Content-Length: <PayloadSizeBytes> Date: <Date> { "ReplicationInstance":{ "AvailabilityZone":"us-east-1c", "ReplicationInstancePrivateIpAddress":"", "ReplicationInstanceArn":"arn:aws:dms:us-east- 1:123456789012:rep:PWEBBEUNOLU7VEB2OHTEH4I4GQ", "ReplicationInstanceClass":"dms.t2.micro", "ReplicationSubnetGroup":{ "ReplicationSubnetGroupDescription":"default", "Subnets":[ { "SubnetStatus":"Active", "SubnetIdentifier":"subnet-f6dd91af", "SubnetAvailabilityZone":{ "Name":"us-east-1d" } }, { "SubnetStatus":"Active", "SubnetIdentifier":"subnet-3605751d", "SubnetAvailabilityZone":{ "Name":"us-east-1b" } }, { "SubnetStatus":"Active", "SubnetIdentifier":"subnet-c2daefb5", "SubnetAvailabilityZone":{ "Name":"us-east-1c" } }, { "SubnetStatus":"Active", "SubnetIdentifier":"subnet-85e90cb8", "SubnetAvailabilityZone":{ "Name":"us-east-1e" } } ], "VpcId":"vpc-6741a603", "SubnetGroupStatus":"Complete", "ReplicationSubnetGroupIdentifier":"default" }, "AutoMinorVersionUpgrade":true, "ReplicationInstanceStatus":"available", "KmsKeyId":"arn:aws:kms:us-east-1:123456789012:key/4dc17316-5543- 4ded-b1e3-d53a7cfb411d", "InstanceCreateTime":1457645140.38, "ReplicationInstancePublicIpAddress":"", "AllocatedStorage":5, "EngineVersion":"1.5.0", "ReplicationInstanceIdentifier":"test-rep-1", "PubliclyAccessible":true, "PreferredMaintenanceWindow":"sun:06:00-sun:14:00", "PendingModifiedValues":{ "ReplicationInstanceClass":"dms.t2.small" } } }

See Also

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