JSPM

AWS DynamoDB Construct Library

Here is a minimal deployable DynamoDB table definition:

import dynamodb = require('@aws-cdk/aws-dynamodb');

const table = new dynamodb.Table(this, 'Table', {
  partitionKey: { name: 'id', type: dynamodb.AttributeType.String }
});

Keys

You can either specify partitionKey and/or sortKey when you initialize the table, or call addPartitionKey and addSortKey after initialization.

Billing Mode

DynamoDB supports two billing modes:

• PROVISIONED - the default mode where the table and global secondary indexes have configured read and write capacity.
• PAY_PER_REQUEST - on-demand pricing and scaling. You only pay for what you use and there is no read and write capacity for the table or its gloal secondary indexes.

import dynamodb = require('@aws-cdk/aws-dynamodb');

const table = new dynamodb.Table(this, 'Table', {
  partitionKey: { name: 'id', type: dynamodb.AttributeType.String },
  billingMode: dynamodb.BillingMode.PayPerRequest
});

Further reading: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ReadWriteCapacityMode.

Configure AutoScaling for your table

You can have DynamoDB automatically raise and lower the read and write capacities of your table by setting up autoscaling. You can use this to either keep your tables at a desired utilization level, or by scaling up and down at preconfigured times of the day:

Auto-scaling is only relevant for tables with the billing mode, PROVISIONED.

Example of configuring autoscaling

Further reading: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/AutoScaling.html https://aws.amazon.com/blogs/database/how-to-use-aws-cloudformation-to-configure-auto-scaling-for-amazon-dynamodb-tables-and-indexes/