What is the simplest way to do this?
Write a script that deletes old records; schedule the script as a cron job on an Amazon EC2 instance.
Add an attribute with the expiration time; enable the Time To Live feature based on that attribute.
Each day, create a new table to hold session data; delete the previous day’s table.
Add an attribute with the expiration time; name the attribute ItemExpiration.
Explanations:
Writing a script and scheduling it as a cron job on an EC2 instance adds complexity and requires manual management of infrastructure. It also doesn’t leverage DynamoDB’s built-in features for automatic data management.
Enabling the Time To Live (TTL) feature in DynamoDB allows items to be automatically deleted after a specified expiration time without manual intervention, making it the simplest and most efficient method.
Creating a new table daily is not a practical solution for managing session data. This approach complicates the architecture, increases costs, and makes data retrieval more challenging, especially for ongoing sessions.
While adding an expiration attribute is necessary for TTL, simply naming it “ItemExpiration” does not activate TTL. The option lacks the important step of enabling the TTL feature in DynamoDB.
I surmise that the answer is:
Add an attribute with the expiration time; enable the Time To Live feature based on that attribute.