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# AWS::SageMaker::InferenceExperiment ShadowModeConfig
<a name="aws-properties-sagemaker-inferenceexperiment-shadowmodeconfig"></a>

 The configuration of `ShadowMode` inference experiment type, which specifies a production variant to take all the inference requests, and a shadow variant to which Amazon SageMaker replicates a percentage of the inference requests. For the shadow variant it also specifies the percentage of requests that Amazon SageMaker replicates. 

## Syntax
<a name="aws-properties-sagemaker-inferenceexperiment-shadowmodeconfig-syntax"></a>

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

### JSON
<a name="aws-properties-sagemaker-inferenceexperiment-shadowmodeconfig-syntax.json"></a>

```
{
  "[ShadowModelVariants](#cfn-sagemaker-inferenceexperiment-shadowmodeconfig-shadowmodelvariants)" : [ ShadowModelVariantConfig, ... ],
  "[SourceModelVariantName](#cfn-sagemaker-inferenceexperiment-shadowmodeconfig-sourcemodelvariantname)" : String
}
```

### YAML
<a name="aws-properties-sagemaker-inferenceexperiment-shadowmodeconfig-syntax.yaml"></a>

```
  [ShadowModelVariants](#cfn-sagemaker-inferenceexperiment-shadowmodeconfig-shadowmodelvariants): 
    - ShadowModelVariantConfig
  [SourceModelVariantName](#cfn-sagemaker-inferenceexperiment-shadowmodeconfig-sourcemodelvariantname): String
```

## Properties
<a name="aws-properties-sagemaker-inferenceexperiment-shadowmodeconfig-properties"></a>

`ShadowModelVariants`  <a name="cfn-sagemaker-inferenceexperiment-shadowmodeconfig-shadowmodelvariants"></a>
List of shadow variant configurations.  
*Required*: Yes  
*Type*: Array of [ShadowModelVariantConfig](aws-properties-sagemaker-inferenceexperiment-shadowmodelvariantconfig.md)  
*Minimum*: `1`  
*Maximum*: `1`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`SourceModelVariantName`  <a name="cfn-sagemaker-inferenceexperiment-shadowmodeconfig-sourcemodelvariantname"></a>
 The name of the production variant, which takes all the inference requests.   
*Required*: Yes  
*Type*: String  
*Pattern*: `^[a-zA-Z0-9]([\-a-zA-Z0-9]*[a-zA-Z0-9])?`  
*Maximum*: `63`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)