Question

An application hosted in AWS has been configured to use a DynamoDB table. Several items are written to the DynamoDB table. These items are only accessed in a particular time frame, after which they can be deleted. Which of the following is an ideal way to manage the deletion of the stale items?

A. Perform a scan on the table for the stale items and issue the Delete operation.

B. Create an additional column to store the date. Perform a query for the stale objectsand the perform the Delete operation.

C. Enable versioning for the items in DynamoDB and delete the last accessed version.

D. Enable TTL for the items in DynamoD.

Answer 1

Answer - D.

The AWS Documentation mentions the following.

Time To Live (TTL) for DynamoDB allows you to define when items in a table expire so that they can be automatically deleted from the database.

TTL is provided at no extra cost as a way to reduce storage usage and reduce the cost of storing irrelevant data without using provisioned throughput.

With TTL enabled on a table, you can set a timestamp for deletion on a per-item basis, allowing you to limit storage usage to only those records that are relevant.

Options A and B are incorrect since these would not be cost-effective and have a performance issue on the underlying DynamoDB table.