# ComputeNode
<a name="API_ComputeNode"></a>

A single compute node in a pipeline DAG. Each compute node references a task and can declare dependencies on other nodes.

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

 ** computeNodeName **   <a name="iotsitewise-Type-ComputeNode-computeNodeName"></a>
The unique name for this compute node within the pipeline.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 64.  
Pattern: `[a-zA-Z0-9_-]+`   
Required: Yes

 ** taskName **   <a name="iotsitewise-Type-ComputeNode-taskName"></a>
The name of the task to execute for this compute node.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 64.  
Pattern: `[a-zA-Z0-9_-]+`   
Required: Yes

 ** dependsOn **   <a name="iotsitewise-Type-ComputeNode-dependsOn"></a>
A list of compute node names that must complete successfully before this node can start.  
Type: Array of strings  
Array Members: Minimum number of 0 items. Maximum number of 10 items.  
Length Constraints: Minimum length of 1. Maximum length of 64.  
Pattern: `[a-zA-Z0-9_-]+`   
Required: No

 ** environmentVariables **   <a name="iotsitewise-Type-ComputeNode-environmentVariables"></a>
Environment variables specific to this compute node. These override pipeline-level environment variables with the same key.  
Type: String to string map  
Map Entries: Minimum number of 0 items. Maximum number of 20 items.  
Key Length Constraints: Minimum length of 1. Maximum length of 255.  
Key Pattern: `(?!(?i)AWS_)[a-zA-Z_][a-zA-Z0-9_]*`   
Value Length Constraints: Minimum length of 0. Maximum length of 1024.  
Required: No

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

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/iotsitewise-2019-12-02/ComputeNode) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iotsitewise-2019-12-02/ComputeNode) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iotsitewise-2019-12-02/ComputeNode)