codereviewanskquestions:

I am trying to set up DynamoDB Table replication using Stream + Lambda. I was wondering how I should handle the failures. For example, I have table A and table B and I'd like to copy any update from table A to table B.

I can set up a trigger using Stream + Lambda. Writing the lambda function to get the events from table A and write to table B quite straight forward.

However, I am not sure how I should handle the failures. In the lambda function, what should I do if write to table B failed for some reason? I can do retires but what should I do if all retries failed?