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I would like to write a lambda function in java so that whenever a particular folder on an EC2 instance is updated with a new file, I need to get that file and upload it to an S3 bucket. Can I do that? What is the appropriate event to handle in the lambda function ? Any example ? Thanks in advance. - Ramesh.

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No, Lambda can't be triggered directly from a file appearing in a folder on an EC2 instance. Look at inotifywait or equivalent. Run that on the EC2 instance and respond to files appearing by syncing them to S3.

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Thanks Jarmod for the confirmation.

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