Amazon Redshift will no longer support the creation of new Python UDFs starting Patch 198. Existing Python UDFs will continue to function until June 30, 2026. For more information, see the [ blog post ](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/). 

# Modifying a cluster
<a name="modify-cluster"></a>

When you modify a cluster, changes to the following options are applied immediately:
+ **VPC security groups** 
+ **Publicly accessible** 
+ **Admin user password** 
+ **HSM Connection** 
+ **HSM Client Certificate** 
+ **Maintenance detail** 
+ **Snapshot preferences** 

 Changes to the following options take effect only after the cluster is restarted:
+ **Cluster identifier**

  Amazon Redshift restarts the cluster automatically when you change **Cluster identifier**.
+ **Enhanced VPC routing**

  Amazon Redshift restarts the cluster automatically when you change **Enhanced VPC routing**.
+ **Cluster parameter group** 
+ **IP address type** 

  This feature is only available in the AWS GovCloud (US-East) and AWS GovCloud (US-West) Regions. For more information on AWS Regions, see [Regions and Availability Zones](https://aws.amazon.com/about-aws/global-infrastructure/regions_az/).

If you decrease the automated snapshot retention period, existing automated snapshots whose settings fall outside of the new retention period are deleted. For more information, see [Amazon Redshift snapshots and backups](working-with-snapshots.md). 

For more information about cluster properties, see [Additional configurations](create-cluster.md#cluster-create-console-configuration). 

**To modify a cluster**

1. Sign in to the AWS Management Console and open the Amazon Redshift console at [https://console.aws.amazon.com/redshiftv2/](https://console.aws.amazon.com/redshiftv2/).

1. On the navigation menu, choose **Clusters**. 

1. Choose the cluster to modify. 

1. Choose **Edit**. The **Edit cluster** page appears.

1. Update the cluster properties. Some of the properties you can modify are: 
   + Cluster identifier
   + Snapshot retention
   + Cluster relocation

   To edit settings for **Network and security**, **Maintenance**, and **Database configurations**, the console provides links to the appropriate cluster details tab.

1. Choose **Save changes**.