feat(redshift): update default node type from DC2_LARGE to RA3_LARGE

packages/@aws-cdk/aws-redshift-alpha/README.md

@@ -53,6 +53,22 @@ A default database named `default_db` will be created in the cluster. To change
 By default, the cluster will not be publicly accessible.
 Depending on your use case, you can make the cluster publicly accessible with the `publiclyAccessible` property.
 
+By default, the node type is `RA3_LARGE`. You can specify a different node type by setting the `nodeType` property.
+
+```ts
+import * as ec2 from 'aws-cdk-lib/aws-ec2';
+
+declare const vpc: ec2.IVpc;
+
+const cluster = new Cluster(this, 'Redshift', {
+  masterUser: {
+    masterUsername: 'admin',
+  },
+  vpc,
+  nodeType: NodeType.RA3_XLPLUS,
+});
+```
+
 ## Adding a logging bucket for database audit logging to S3
 
 Amazon Redshift logs information about connections and user activities in your database. These logs help you to monitor the database for security and troubleshooting purposes, a process called database auditing. To send these logs to an S3 bucket, specify the `loggingProperties` when creating a new cluster.

packages/@aws-cdk/aws-redshift-alpha/lib/cluster.ts

@@ -283,7 +283,7 @@ export interface ClusterProps {
   /**
    * The node type to be provisioned for the cluster.
    *
-   * @default `NodeType.DC2_LARGE`
+   * @default `NodeType.RA3_LARGE`
    */
   readonly nodeType?: NodeType;
 
@@ -650,7 +650,7 @@ export class Cluster extends ClusterBase {
       );
     }
 
-    const nodeType = props.nodeType || NodeType.DC2_LARGE;
+    const nodeType = props.nodeType || NodeType.RA3_LARGE;
 
     if (props.multiAz) {
       if (!nodeType.startsWith('ra3')) {

packages/@aws-cdk/aws-redshift-alpha/test/cluster.test.ts

@@ -35,7 +35,7 @@ test('check that instantiation works', () => {
       AutomatedSnapshotRetentionPeriod: 1,
       Encrypted: true,
       NumberOfNodes: 2,
-      NodeType: 'dc2.large',
+      NodeType: 'ra3.large',
       DBName: 'default_db',
       PubliclyAccessible: false,
       ClusterSubnetGroupName: { Ref: 'RedshiftSubnetsDFE70E0A' },
@@ -661,7 +661,7 @@ test.each([
       AutomatedSnapshotRetentionPeriod: 1,
       Encrypted: true,
       NumberOfNodes: 2,
-      NodeType: 'dc2.large',
+      NodeType: 'ra3.large',
       DBName: 'default_db',
       PubliclyAccessible: false,
       ClusterSubnetGroupName: { Ref: 'RedshiftSubnetsDFE70E0A' },
@@ -693,7 +693,7 @@ test('resize type not set', () => {
       AutomatedSnapshotRetentionPeriod: 1,
       Encrypted: true,
       NumberOfNodes: 2,
-      NodeType: 'dc2.large',
+      NodeType: 'ra3.large',
       DBName: 'default_db',
       PubliclyAccessible: false,
       ClusterSubnetGroupName: { Ref: 'RedshiftSubnetsDFE70E0A' },
@@ -725,7 +725,7 @@ test('elastic ip address', () => {
       AutomatedSnapshotRetentionPeriod: 1,
       Encrypted: true,
       NumberOfNodes: 2,
-      NodeType: 'dc2.large',
+      NodeType: 'ra3.large',
       DBName: 'default_db',
       PubliclyAccessible: false,
       ClusterSubnetGroupName: { Ref: 'RedshiftSubnetsDFE70E0A' },