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# AWS::ElastiCache::ReservedCacheNode
<a name="aws-resource-elasticache-reservedcachenode"></a>

Represents the output of a `PurchaseReservedCacheNodesOffering` operation.

## Syntax
<a name="aws-resource-elasticache-reservedcachenode-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-resource-elasticache-reservedcachenode-syntax.json"></a>

```
{
  "Type" : "AWS::ElastiCache::ReservedCacheNode"
}
```

### YAML
<a name="aws-resource-elasticache-reservedcachenode-syntax.yaml"></a>

```
Type: AWS::ElastiCache::ReservedCacheNode
```

## Return values
<a name="aws-resource-elasticache-reservedcachenode-return-values"></a>

### Ref
<a name="aws-resource-elasticache-reservedcachenode-return-values-ref"></a>

### Fn::GetAtt
<a name="aws-resource-elasticache-reservedcachenode-return-values-fn--getatt"></a>

#### 
<a name="aws-resource-elasticache-reservedcachenode-return-values-fn--getatt-fn--getatt"></a>

`CacheNodeCount`  <a name="CacheNodeCount-fn::getatt"></a>
The number of cache nodes that have been reserved.

`CacheNodeType`  <a name="CacheNodeType-fn::getatt"></a>
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.

`Duration`  <a name="Duration-fn::getatt"></a>
The duration of the reservation in seconds.

`FixedPrice`  <a name="FixedPrice-fn::getatt"></a>
The fixed price charged for this reserved cache node.

`OfferingType`  <a name="OfferingType-fn::getatt"></a>
The offering type of this reserved cache node.

`ProductDescription`  <a name="ProductDescription-fn::getatt"></a>
The description of the reserved cache node.

`RecurringCharges`  <a name="RecurringCharges-fn::getatt"></a>
The recurring price charged to run this reserved cache node.

`ReservationARN`  <a name="ReservationARN-fn::getatt"></a>
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`

`ReservedCacheNodeId`  <a name="ReservedCacheNodeId-fn::getatt"></a>
The unique identifier for the reservation.

`ReservedCacheNodesOfferingId`  <a name="ReservedCacheNodesOfferingId-fn::getatt"></a>
The offering identifier.

`StartTime`  <a name="StartTime-fn::getatt"></a>
The time the reservation started.

`State`  <a name="State-fn::getatt"></a>
The state of the reserved cache node.

`Tags`  <a name="Tags-fn::getatt"></a>
A list of tags to be added to this resource. A tag is a key-value pair. A tag key must be accompanied by a tag value, although null is accepted.

`UsagePrice`  <a name="UsagePrice-fn::getatt"></a>
The hourly price charged for this reserved cache node.