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# AWS::Config::DeliveryChannel ConfigSnapshotDeliveryProperties
<a name="aws-properties-config-deliverychannel-configsnapshotdeliveryproperties"></a>

Provides options for how often Amazon Config delivers configuration snapshots to the Amazon S3 bucket in your delivery channel.

**Note**  
If you want to create a rule that triggers evaluations for your resources when Amazon Config delivers the configuration snapshot, see the following:

The frequency for a rule that triggers evaluations for your resources when Amazon Config delivers the configuration snapshot is set by one of two values, depending on which is less frequent:
+ The value for the `deliveryFrequency` parameter within the delivery channel configuration, which sets how often Amazon Config delivers configuration snapshots. This value also sets how often Amazon Config invokes evaluations for Amazon Config rules.
+ The value for the `MaximumExecutionFrequency` parameter, which sets the maximum frequency with which Amazon Config invokes evaluations for the rule. For more information, see [ConfigRule](https://docs.amazonaws.cn/config/latest/APIReference/API_ConfigRule.html).

If the `deliveryFrequency` value is less frequent than the `MaximumExecutionFrequency` value for a rule, Amazon Config invokes the rule only as often as the `deliveryFrequency` value.

1. For example, you want your rule to run evaluations when Amazon Config delivers the configuration snapshot.

1. You specify the `MaximumExecutionFrequency` value for `Six_Hours`. 

1. You then specify the delivery channel `deliveryFrequency` value for `TwentyFour_Hours`.

1. Because the value for `deliveryFrequency` is less frequent than `MaximumExecutionFrequency`, Amazon Config invokes evaluations for the rule every 24 hours. 

You should set the `MaximumExecutionFrequency` value to be at least as frequent as the `deliveryFrequency` value. You can view the `deliveryFrequency` value by using the `DescribeDeliveryChannnels` action.

To update the `deliveryFrequency` with which Amazon Config delivers your configuration snapshots, use the `PutDeliveryChannel` action.

## Syntax
<a name="aws-properties-config-deliverychannel-configsnapshotdeliveryproperties-syntax"></a>

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

### JSON
<a name="aws-properties-config-deliverychannel-configsnapshotdeliveryproperties-syntax.json"></a>

```
{
  "[DeliveryFrequency](#cfn-config-deliverychannel-configsnapshotdeliveryproperties-deliveryfrequency)" : String
}
```

### YAML
<a name="aws-properties-config-deliverychannel-configsnapshotdeliveryproperties-syntax.yaml"></a>

```
  [DeliveryFrequency](#cfn-config-deliverychannel-configsnapshotdeliveryproperties-deliveryfrequency): String
```

## Properties
<a name="aws-properties-config-deliverychannel-configsnapshotdeliveryproperties-properties"></a>

`DeliveryFrequency`  <a name="cfn-config-deliverychannel-configsnapshotdeliveryproperties-deliveryfrequency"></a>
The frequency with which Amazon Config delivers configuration snapshots.  
*Required*: No  
*Type*: String  
*Allowed values*: `One_Hour | Three_Hours | Six_Hours | Twelve_Hours | TwentyFour_Hours`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)