Amazon ElastiCache
API Reference (API Version 2015-02-02)


Returns information about reserved cache nodes for this account, or about a specified reserved cache node.

Request Parameters

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


The cache node type filter value. Use this parameter to show only those reservations matching the specified cache node type.

The following node types are supported by ElastiCache. Generally speaking, the current generation types provide more memory and computational power at lower cost when compared to their equivalent previous generation counterparts.

  • General purpose:

    • Current generation:

      T2 node types: cache.t2.micro, cache.t2.small, cache.t2.medium

      M3 node types: cache.m3.medium, cache.m3.large, cache.m3.xlarge, cache.m3.2xlarge

      M4 node types: cache.m4.large, cache.m4.xlarge, cache.m4.2xlarge, cache.m4.4xlarge, cache.m4.10xlarge

    • Previous generation: (not recommended)

      T1 node types: cache.t1.micro

      M1 node types: cache.m1.small, cache.m1.medium, cache.m1.large, cache.m1.xlarge

  • Compute optimized:

    • Previous generation: (not recommended)

      C1 node types: cache.c1.xlarge

  • Memory optimized:

    • Current generation:

      R3 node types: cache.r3.large, cache.r3.xlarge, cache.r3.2xlarge, cache.r3.4xlarge, cache.r3.8xlarge

      R4 node types; cache.r4.large, cache.r4.xlarge, cache.r4.2xlarge, cache.r4.4xlarge, cache.r4.8xlarge, cache.r4.16xlarge

    • Previous generation: (not recommended)

      M2 node types: cache.m2.xlarge, cache.m2.2xlarge, cache.m2.4xlarge


  • All T2 instances are created in an Amazon Virtual Private Cloud (Amazon VPC).

  • Redis (cluster mode disabled): Redis backup/restore is not supported on T1 and T2 instances.

  • Redis (cluster mode enabled): Backup/restore is not supported on T1 instances.

  • Redis Append-only files (AOF) functionality is not supported for T1 or T2 instances.

For a complete listing of node types and specifications, see:

Type: String

Required: No


The duration filter value, specified in years or seconds. Use this parameter to show only reservations for this duration.

Valid Values: 1 | 3 | 31536000 | 94608000

Type: String

Required: No


An optional marker returned from a prior request. Use this marker for pagination of results from this operation. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by MaxRecords.

Type: String

Required: No


The maximum number of records to include in the response. If more records exist than the specified MaxRecords value, a marker is included in the response so that the remaining results can be retrieved.

Default: 100

Constraints: minimum 20; maximum 100.

Type: Integer

Required: No


The offering type filter value. Use this parameter to show only the available offerings matching the specified offering type.

Valid values: "Light Utilization"|"Medium Utilization"|"Heavy Utilization"

Type: String

Required: No


The product description filter value. Use this parameter to show only those reservations matching the specified product description.

Type: String

Required: No


The reserved cache node identifier filter value. Use this parameter to show only the reservation that matches the specified reservation ID.

Type: String

Required: No


The offering identifier filter value. Use this parameter to show only purchased reservations matching the specified offering identifier.

Type: String

Required: No

Response Elements

The following elements are returned by the service.


Provides an identifier to allow retrieval of paginated results.

Type: String


A list of reserved cache nodes. Each element in the list contains detailed information about one node.

Type: Array of ReservedCacheNode objects


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


Two or more incompatible parameters were specified.

HTTP Status Code: 400


The value for a parameter is invalid.

HTTP Status Code: 400


The requested reserved cache node was not found.

HTTP Status Code: 404


The specified service linked role (SLR) was not found.

HTTP Status Code: 400



Sample Request ?Action=DescribeReservedCacheNodes &ReservedCacheNodeId=customerSpecifiedID &Version=2015-02-02 &SignatureVersion=4 &SignatureMethod=HmacSHA256 &Timestamp=20150202T192317Z &X-Amz-Credential=<credential>

Sample Response

<DescribeReservedCacheNodesResponse xmlns=""> <DescribeReservedCacheNodesResult> <ReservedCacheNodes> <ReservedCacheNode> <OfferingType>Medium Utilization</OfferingType> <RecurringCharges/> <ProductDescription>memcached</ProductDescription> <ReservedCacheNodesOfferingId>649fd0c8-cf6d-47a0-bfa6-060f8e75e95f</ReservedCacheNodesOfferingId> <State>payment-failed</State> <ReservedCacheNodeId>myreservationid</ReservedCacheNodeId> <CacheNodeCount>1</CacheNodeCount> <StartTime>2010-12-15T00:25:14.131Z</StartTime> <Duration>31536000</Duration> <FixedPrice>227.5</FixedPrice> <UsagePrice>0.046</UsagePrice> <CacheNodeType>cache.m1.small</CacheNodeType> </ReservedCacheNode> </DescribeReservedCacheNodesResult> <ResponseMetadata> <RequestId>c695119b-2961-11e1-bd06-6fe008f046c3</RequestId> </ResponseMetadata> </DescribeReservedCacheNodesResponse>

See Also

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