如何在DynamoDB副本上设置实时恢复

Question

我正在使用CDK在DynamoDB上创建一个全局表。我想在所有的复制品上设置实时恢复。但是，PITR只在原始表上设置，而不是在其他副本上设置。这是我的密码。

import { Stack, StackProps, App } from 'aws-cdk-lib';
import { Table, BillingMode, AttributeType, StreamViewType } from 'aws-cdk-lib/aws-dynamodb';

export class HelloCdkStack extends Stack {
  constructor(scope: App, id: string, props?: StackProps) {
    super(scope, id, props);

    new Table(this, 'Movies', {
      tableName: 'Music',
      partitionKey: {
        name: 'Artist', 
        type: AttributeType.STRING
      },
      sortKey: {
        name: 'SongTitle', 
        type: AttributeType.STRING
      },
      billingMode: BillingMode.PAY_PER_REQUEST,
      replicationRegions: ['eu-west-1'],
      pointInTimeRecovery: true,
      stream: StreamViewType.NEW_AND_OLD_IMAGES,
    });
  }
}

Answer 1

我想出了解决这个问题的办法。我对全局表使用了L1构造。我之前使用的L2构造似乎不支持为副本设置PITR。下面是一个有效的代码示例

new CfnGlobalTable(this, 'Music', {
      tableName: 'Music',
      attributeDefinitions: [
        {attributeName: 'SongTitle', attributeType: AttributeType.STRING},
      ],
      keySchema: [{attributeName: 'SongTitle', keyType: 'HASH'}],
      billingMode: BillingMode.PAY_PER_REQUEST,
      streamSpecification: { streamViewType: "NEW_AND_OLD_IMAGES" },
      replicas: ['us-east-1', 'eu-west-1'].map(region => {
        return {
          region: region,
          pointInTimeRecoverySpecification: { pointInTimeRecoveryEnabled: true }
        };
      })
    });