# Event
<a name="API_Event"></a>

Represents a single occurrence of something interesting within the system. Some examples of events are creating a cluster, adding or removing a cache node, or rebooting a node.

## Contents
<a name="API_Event_Contents"></a>

**Note**  
In the following list, the required parameters are described first.

 ** Date **   
The date and time when the event occurred.  
Type: Timestamp  
Required: No

 ** Message **   
The text of the event.  
Type: String  
Required: No

 ** SourceIdentifier **   
The identifier for the source of the event. For example, if the event occurred at the cluster level, the identifier would be the name of the cluster.  
Type: String  
Required: No

 ** SourceType **   
Specifies the origin of this event - a cluster, a parameter group, a security group, etc.  
Type: String  
Valid Values: `cache-cluster | cache-parameter-group | cache-security-group | cache-subnet-group | replication-group | serverless-cache | serverless-cache-snapshot | user | user-group`   
Required: No

## See Also
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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/Event) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/elasticache-2015-02-02/Event) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/elasticache-2015-02-02/Event)