# Document history
<a name="doc-history"></a>

The following table describes significant changes to this guide. If you want to be notified about future updates, you can subscribe to an [RSS feed](https://docs.aws.amazon.com/prescriptive-guidance/latest/modernization-data-persistence/modernization-data-persistence.rss).

| Change | Description | Date | 
| --- |--- |--- |
| [Clarifications](#doc-history) | We clarified some of the informnation for the [database-per-service](https://docs.aws.amazon.com/en_us/prescriptive-guidance/latest/modernization-data-persistence/database-per-service.html) and [shared-database-per-service](https://docs.aws.amazon.com/en_us/prescriptive-guidance/latest/modernization-data-persistence/shared-database.html) patterns. | April 7, 2025 | 
| [Updated pattern](#doc-history) | We updated the [Amazon EventBridge implementation](https://docs.aws.amazon.com/prescriptive-guidance/latest/modernization-data-persistence/service-per-team.html#amazon-eventbridge) section of the event sourcing pattern. | December 4, 2023 | 
| [Expanded section](#doc-history) | We updated the [CQRS pattern](https://docs.aws.amazon.com/prescriptive-guidance/latest/modernization-data-persistence/cqrs-pattern.html) with more information. | November 17, 2023 | 
| [Added a link for implementing the saga pattern with Step Functions](#doc-history) | We updated the [Home](https://docs.aws.amazon.com/prescriptive-guidance/latest/modernization-data-persistence/welcome.html) and [Saga pattern](https://docs.aws.amazon.com/prescriptive-guidance/latest/modernization-data-persistence/saga-pattern.html) sections with the link to the pattern [Implement the serverless saga pattern by using AWS Step Functions](https://docs.aws.amazon.com/prescriptive-guidance/latest/patterns/implement-the-serverless-saga-pattern-by-using-aws-step-functions.html) from the AWS Prescriptive Guidance website. | February 23, 2021 | 
| [Initial publication](#doc-history) | — | January 27, 2021 |