Which solution would accomplish the desired outcome?
Increase the size of the instance to speed up processing and update the schedule to run once an hour.
Convert the cron job to an AWS Lambda function and trigger this new function using a cron job on an EC2 instance.
Convert the cron job to an AWS Lambda function and schedule it to run once an hour using Amazon CloudWatch Events.
Create an AWS Lambda function that runs when a file is delivered to Amazon S3 using S3 event notifications.
Explanations:
Increasing the instance size may provide some speedup, but running the cron job once an hour would still lead to delays in data availability. This option does not ensure immediate processing after file arrival and does not scale well for handling frequent file uploads.
While converting the cron job to a Lambda function may offer some benefits, triggering it from a cron job on EC2 does not change the fact that there will still be delays. The data would not be processed immediately after file uploads, leading to continued latency.
Scheduling the Lambda function to run once an hour does improve the frequency of processing compared to the daily cron job, but it still does not provide real-time processing of the files as they arrive. Consumers would still experience delays.
Creating a Lambda function that triggers on S3 event notifications allows for immediate processing of the data as soon as a file is delivered. This approach ensures that data is available to consumers with minimal delay, fulfilling the requirement for timely data access.
I think the answer is:
Create an AWS Lambda function that runs when a file is delivered to Amazon S3 using S3 event notifications.