# ClusterTimeline
<a name="API_ClusterTimeline"></a>

Represents the timeline of the cluster's lifecycle.

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

 ** CreationDateTime **   <a name="EMR-Type-ClusterTimeline-CreationDateTime"></a>
The creation date and time of the cluster.  
Type: Timestamp  
Required: No

 ** EndDateTime **   <a name="EMR-Type-ClusterTimeline-EndDateTime"></a>
The date and time when the cluster was terminated.  
Type: Timestamp  
Required: No

 ** ReadyDateTime **   <a name="EMR-Type-ClusterTimeline-ReadyDateTime"></a>
The date and time when the cluster was ready to run steps.  
Type: Timestamp  
Required: No

## See Also
<a name="API_ClusterTimeline_SeeAlso"></a>

For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\+\+](https://docs.amazonaws.cn/goto/SdkForCpp/elasticmapreduce-2009-03-31/ClusterTimeline) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/elasticmapreduce-2009-03-31/ClusterTimeline) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/elasticmapreduce-2009-03-31/ClusterTimeline)