# LaunchTemplatePlacementRequest
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Describes the placement of an instance.

## Contents
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 ** Affinity **   
The affinity setting for an instance on a Dedicated Host.  
Type: String  
Required: No

 ** AvailabilityZone **   
The Availability Zone for the instance.  
Either `AvailabilityZone` or `AvailabilityZoneId` can be specified, but not both  
Type: String  
Required: No

 ** AvailabilityZoneId **   
The ID of the Availability Zone for the instance.  
Either `AvailabilityZone` or `AvailabilityZoneId` can be specified, but not both  
Type: String  
Required: No

 ** GroupId **   
The Group Id of a placement group. You must specify the Placement Group **Group Id** to launch an instance in a shared placement group.  
Type: String  
Required: No

 ** GroupName **   
The name of the placement group for the instance.  
Type: String  
Required: No

 ** HostId **   
The ID of the Dedicated Host for the instance.  
Type: String  
Required: No

 ** HostResourceGroupArn **   
The ARN of the host resource group in which to launch the instances. If you specify a host resource group ARN, omit the **Tenancy** parameter or set it to `host`.  
Type: String  
Required: No

 ** PartitionNumber **   
The number of the partition the instance should launch in. Valid only if the placement group strategy is set to `partition`.  
Type: Integer  
Required: No

 ** SpreadDomain **   
Reserved for future use.  
Type: String  
Required: No

 ** Tenancy **   
The tenancy of the instance. An instance with a tenancy of dedicated runs on single-tenant hardware.  
Type: String  
Valid Values: `default | dedicated | host`   
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/ec2-2016-11-15/LaunchTemplatePlacementRequest) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/LaunchTemplatePlacementRequest) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/LaunchTemplatePlacementRequest)