# System
<a name="API_System"></a>

Represents a system in Resilience Hub. A system is a logical grouping of services.

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

 ** name **   <a name="ngresiliencehub-Type-System-name"></a>
Resource name (used in ARN — no spaces allowed).  
Type: String  
Length Constraints: Minimum length of 2. Maximum length of 60.  
Pattern: `[A-Za-z0-9][A-Za-z0-9_\-]{1,59}`   
Required: Yes

 ** systemArn **   <a name="ngresiliencehub-Type-System-systemArn"></a>
ARN identifier.  
Type: String  
Length Constraints: Minimum length of 31.  
Pattern: `arn:(aws|aws-cn|aws-iso|aws-iso-[a-z]{1}|aws-us-gov):[A-Za-z0-9][A-Za-z0-9_/.-]{0,62}:([a-z]{2}-((iso[a-z]{0,1}-)|(gov-)){0,1}[a-z]+-[0-9]):[0-9]{12}:[A-Za-z0-9/][A-Za-z0-9:_/+.-]{0,1023}`   
Required: Yes

 ** systemId **   <a name="ngresiliencehub-Type-System-systemId"></a>
System ID for cross-account use without exposing account structure.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Pattern: `\S{1,255}`   
Required: Yes

 ** createdAt **   <a name="ngresiliencehub-Type-System-createdAt"></a>
The timestamp when the system was created.  
Type: Timestamp  
Required: No

 ** description **   <a name="ngresiliencehub-Type-System-description"></a>
Resource description.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 500.  
Required: No

 ** kmsKeyId **   <a name="ngresiliencehub-Type-System-kmsKeyId"></a>
KMS key identifier — accepts key ID, key ARN, alias name, or alias ARN.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 2048.  
Required: No

 ** organizationId **   <a name="ngresiliencehub-Type-System-organizationId"></a>
The AWS Organizations identifier for the system.  
Type: String  
Length Constraints: Minimum length of 12. Maximum length of 34.  
Pattern: `o-[a-z0-9]{10,32}`   
Required: No

 ** ouId **   <a name="ngresiliencehub-Type-System-ouId"></a>
The organizational unit (OU) identifier for the system.  
Type: String  
Length Constraints: Minimum length of 16. Maximum length of 68.  
Pattern: `ou-[a-z0-9]{4,32}-[a-z0-9]{8,32}`   
Required: No

 ** sharingEnabled **   <a name="ngresiliencehub-Type-System-sharingEnabled"></a>
Indicates whether cross-account sharing is enabled.  
Type: Boolean  
Required: No

 ** tags **   <a name="ngresiliencehub-Type-System-tags"></a>
Resource tags.  
Type: String to string map  
Map Entries: Maximum number of 50 items.  
Key Length Constraints: Minimum length of 1. Maximum length of 128.  
Key Pattern: `[^\x00-\x1f\x22]+`   
Value Length Constraints: Minimum length of 0. Maximum length of 256.  
Value Pattern: `[^\x00-\x1f\x22]*`   
Required: No

 ** updatedAt **   <a name="ngresiliencehub-Type-System-updatedAt"></a>
The timestamp when the system was last updated.  
Type: Timestamp  
Required: No

## See Also
<a name="API_System_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/resiliencehubv2-2026-02-17/System) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/resiliencehubv2-2026-02-17/System) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/resiliencehubv2-2026-02-17/System)