# IcebergOptimizationProperties
<a name="API_IcebergOptimizationProperties"></a>

A structure that specifies Iceberg table optimization properties for the catalog, including configurations for compaction, retention, and orphan file deletion operations.

## Contents
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 ** Compaction **   <a name="Glue-Type-IcebergOptimizationProperties-Compaction"></a>
A map of key-value pairs that specify configuration parameters for Iceberg table compaction operations, which optimize the layout of data files to improve query performance.  
Type: String to string map  
Key Length Constraints: Minimum length of 1. Maximum length of 255.  
Key Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\t]*`   
Value Length Constraints: Maximum length of 512000.  
Required: No

 ** OrphanFileDeletion **   <a name="Glue-Type-IcebergOptimizationProperties-OrphanFileDeletion"></a>
A map of key-value pairs that specify configuration parameters for Iceberg orphan file deletion operations, which identify and remove files that are no longer referenced by the table metadata.  
Type: String to string map  
Key Length Constraints: Minimum length of 1. Maximum length of 255.  
Key Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\t]*`   
Value Length Constraints: Maximum length of 512000.  
Required: No

 ** Retention **   <a name="Glue-Type-IcebergOptimizationProperties-Retention"></a>
A map of key-value pairs that specify configuration parameters for Iceberg table retention operations, which manage the lifecycle of table snapshots to control storage costs.  
Type: String to string map  
Key Length Constraints: Minimum length of 1. Maximum length of 255.  
Key Pattern: `[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\t]*`   
Value Length Constraints: Maximum length of 512000.  
Required: No

 ** RoleArn **   <a name="Glue-Type-IcebergOptimizationProperties-RoleArn"></a>
The Amazon Resource Name (ARN) of the IAM role that will be assumed to perform Iceberg table optimization operations.  
Type: String  
Pattern: `^arn:aws(-(cn|us-gov|iso(-[bef])?))?:iam::[0-9]{12}:role/.+`   
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\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/glue-2017-03-31/IcebergOptimizationProperties) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/glue-2017-03-31/IcebergOptimizationProperties) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/glue-2017-03-31/IcebergOptimizationProperties)