Understanding DynamoDB TTL

Lab Details

This lab will show you how to create a table using Amazon DynamoDB. We will then insert two values into the table. One with an expiration date and one without. Finally, we'll check if the items get deleted once the TTL expires.

The DynamoDB table will be used to practice the lab.

Time: 45 minutes

AWS Region: US East, N. Virginia us-east-1

Introduction

What is AWS DynamoDB and how can it help you?

Definition

DynamoDB, a flexible and fast NoSQL database, is designed for applications that require consistent, one-digit millisecond latency at all scales.

It offers a flexible data model. It doesn't require you to create a database schema beforehand. It is also reliable in performance.

DynamoDB works well for mobile gaming, IoT, and many other applications.

DynamoDB tables

DynamoDB tables contain the following:

Items (Think about a row of data within a table).

Attributes (Think about a column of data within a table).

Supports key-value, document and data structures.

Key= The name of the data. Value = the data itself.

You can write a document in JSON, HTML, or XML.

DynamoDB TTL

Amazon DynamoDB Time to Live allows you to set a per-item time stamp to determine when an item is not needed.

DynamoDB removes the item from your table and does not consume any write throughput.

TTL is included at no additional cost.

If you have items that are no longer relevant after a certain time, TTL can be useful.