DescribeReservedInstancesModifications - Amazon Elastic Compute Cloud
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Describes the modifications made to your Reserved Instances. If no parameter is specified, information about all your Reserved Instances modification requests is returned. If a modification ID is specified, only information about the specific modification is returned.

For more information, see Modify Reserved Instances in the Amazon EC2 User Guide.


The order of the elements in the response, including those within nested structures, might vary. Applications should not assume the elements appear in a particular order.

Request Parameters

The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see Common Query Parameters.


One or more filters.

  • client-token - The idempotency token for the modification request.

  • create-date - The time when the modification request was created.

  • effective-date - The time when the modification becomes effective.

  • modification-result.reserved-instances-id - The ID for the Reserved Instances created as part of the modification request. This ID is only available when the status of the modification is fulfilled.

  • - The Availability Zone for the new Reserved Instances.

  • - The number of new Reserved Instances.

  • - The instance type of the new Reserved Instances.

  • reserved-instances-id - The ID of the Reserved Instances modified.

  • reserved-instances-modification-id - The ID of the modification request.

  • status - The status of the Reserved Instances modification request (processing | fulfilled | failed).

  • status-message - The reason for the status.

  • update-date - The time when the modification request was last updated.

Type: Array of Filter objects

Required: No


The token to retrieve the next page of results.

Type: String

Required: No


IDs for the submitted modification request.

Type: Array of strings

Required: No

Response Elements

The following elements are returned by the service.


The token to use to retrieve the next page of results. This value is null when there are no more results to return.

Type: String


The ID of the request.

Type: String


The Reserved Instance modification information.

Type: Array of ReservedInstancesModification objects


For information about the errors that are common to all actions, see Common client error codes.


Example 1

This example illustrates one usage of DescribeReservedInstancesModifications.

Sample Request &AUTHPARAMS

Example 2

This example filters the response to include only Reserved Instances modification requests with status processing.

Sample Request &Filter.1.Name=status &Filter.1.Value.1=processing &AUTHPARAMS

See Also

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