# Working with custom engine versions for Amazon RDS Custom for Oracle
<a name="custom-cev"></a>

**Note**  
End of support notice: On March 31, 2027, AWS will end support for Amazon RDS Custom for Oracle. After March 31, 2027, you will no longer be able to access the RDS Custom for Oracle console or RDS Custom for Oracle resources. For more information, see [RDS Custom for Oracle end of support](RDS-Custom-for-Oracle-end-of-support.md).

A *custom engine version (CEV)* for Amazon RDS Custom for Oracle is a binary volume snapshot of a database engine and specific Amazon Machine Image (AMI). By default, RDS Custom for Oracle uses the latest available AMI managed by RDS Custom, but you can specify an AMI that was used in a previous CEV. You store your database installation files in Amazon S3. RDS Custom uses the installation files and the AMI to create your CEV for you.

**Topics**
+ [Preparing to create a CEV](custom-cev.preparing.md)
+ [Creating a CEV](custom-cev.create.md)
+ [Modifying CEV status](custom-cev.modify.md)
+ [Viewing CEV details for Amazon RDS Custom for Oracle](custom-cev.view.md)
+ [Deleting a CEV](custom-cev.delete.md)

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon RDS. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query AmazonRDS` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).