# ReservedCacheNode
Represents the output of a `PurchaseReservedCacheNodesOffering` operation.
## Contents
**Note**
In the following list, the required parameters are described first.
** CacheNodeCount **
The number of cache nodes that have been reserved.
Type: Integer
Required: No
** CacheNodeType **
The cache node type for the reserved cache nodes.
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:
**M7g node types**: `cache.m7g.large`, `cache.m7g.xlarge`, `cache.m7g.2xlarge`, `cache.m7g.4xlarge`, `cache.m7g.8xlarge`, `cache.m7g.12xlarge`, `cache.m7g.16xlarge`
**Note**
For region availability, see [Supported Node Types](https://docs.aws.amazon.com/AmazonElastiCache/latest/dg/CacheNodes.SupportedTypes.html#CacheNodes.SupportedTypesByRegion)
**M6g node types** (available only for Redis OSS engine version 5.0.6 onward and for Memcached engine version 1.5.16 onward): `cache.m6g.large`, `cache.m6g.xlarge`, `cache.m6g.2xlarge`, `cache.m6g.4xlarge`, `cache.m6g.8xlarge`, `cache.m6g.12xlarge`, `cache.m6g.16xlarge`
**M5 node types:** `cache.m5.large`, `cache.m5.xlarge`, `cache.m5.2xlarge`, `cache.m5.4xlarge`, `cache.m5.12xlarge`, `cache.m5.24xlarge`
**M4 node types:** `cache.m4.large`, `cache.m4.xlarge`, `cache.m4.2xlarge`, `cache.m4.4xlarge`, `cache.m4.10xlarge`
**T4g node types** (available only for Redis OSS engine version 5.0.6 onward and Memcached engine version 1.5.16 onward): `cache.t4g.micro`, `cache.t4g.small`, `cache.t4g.medium`
**T3 node types:** `cache.t3.micro`, `cache.t3.small`, `cache.t3.medium`
**T2 node types:** `cache.t2.micro`, `cache.t2.small`, `cache.t2.medium`
+ Previous generation: (not recommended. Existing clusters are still supported but creation of new clusters is not supported for these types.)
**T1 node types:** `cache.t1.micro`
**M1 node types:** `cache.m1.small`, `cache.m1.medium`, `cache.m1.large`, `cache.m1.xlarge`
**M3 node types:** `cache.m3.medium`, `cache.m3.large`, `cache.m3.xlarge`, `cache.m3.2xlarge`
+ Compute optimized:
+ Previous generation: (not recommended. Existing clusters are still supported but creation of new clusters is not supported for these types.)
**C1 node types:** `cache.c1.xlarge`
+ Memory optimized:
+ Current generation:
**R7g node types**: `cache.r7g.large`, `cache.r7g.xlarge`, `cache.r7g.2xlarge`, `cache.r7g.4xlarge`, `cache.r7g.8xlarge`, `cache.r7g.12xlarge`, `cache.r7g.16xlarge`
**Note**
For region availability, see [Supported Node Types](https://docs.aws.amazon.com/AmazonElastiCache/latest/dg/CacheNodes.SupportedTypes.html#CacheNodes.SupportedTypesByRegion)
**R6g node types** (available only for Redis OSS engine version 5.0.6 onward and for Memcached engine version 1.5.16 onward): `cache.r6g.large`, `cache.r6g.xlarge`, `cache.r6g.2xlarge`, `cache.r6g.4xlarge`, `cache.r6g.8xlarge`, `cache.r6g.12xlarge`, `cache.r6g.16xlarge`
**R5 node types:** `cache.r5.large`, `cache.r5.xlarge`, `cache.r5.2xlarge`, `cache.r5.4xlarge`, `cache.r5.12xlarge`, `cache.r5.24xlarge`
**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. Existing clusters are still supported but creation of new clusters is not supported for these types.)
**M2 node types:** `cache.m2.xlarge`, `cache.m2.2xlarge`, `cache.m2.4xlarge`
**R3 node types:** `cache.r3.large`, `cache.r3.xlarge`, `cache.r3.2xlarge`, `cache.r3.4xlarge`, `cache.r3.8xlarge`
**Additional node type info**
+ All current generation instance types are created in Amazon VPC by default.
+ Valkey or Redis OSS append-only files (AOF) are not supported for T1 or T2 instances.
+ Valkey or Redis OSS Multi-AZ with automatic failover is not supported on T1 instances.
+ The configuration variables `appendonly` and `appendfsync` are not supported on Valkey, or on Redis OSS version 2.8.22 and later.
Type: String
Required: No
** Duration **
The duration of the reservation in seconds.
Type: Integer
Required: No
** FixedPrice **
The fixed price charged for this reserved cache node.
Type: Double
Required: No
** OfferingType **
The offering type of this reserved cache node.
Type: String
Required: No
** ProductDescription **
The description of the reserved cache node.
Type: String
Required: No
** RecurringCharges.RecurringCharge.N **
The recurring price charged to run this reserved cache node.
Type: Array of [RecurringCharge](API_RecurringCharge.md) objects
Required: No
** ReservationARN **
The Amazon Resource Name (ARN) of the reserved cache node.
Example: `arn:aws:elasticache:us-east-1:123456789012:reserved-instance:ri-2017-03-27-08-33-25-582`
Type: String
Required: No
** ReservedCacheNodeId **
The unique identifier for the reservation.
Type: String
Required: No
** ReservedCacheNodesOfferingId **
The offering identifier.
Type: String
Required: No
** StartTime **
The time the reservation started.
Type: Timestamp
Required: No
** State **
The state of the reserved cache node.
Type: String
Required: No
** UsagePrice **
The hourly price charged for this reserved cache node.
Type: Double
Required: No
## See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
+ [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/elasticache-2015-02-02/ReservedCacheNode)
+ [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/elasticache-2015-02-02/ReservedCacheNode)
+ [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/elasticache-2015-02-02/ReservedCacheNode)