DynamoDB stack type logging

Question

Let's say I'm trying to log some program's output to DynamoDB table, but I need to keep let's say only the last 5000 rows. What's the best way to achieve that? I mean it's sounds like a bit extreme to check every single time when I need to put something in there and check if that would overfill the limit, retrieve the first row and delete it.

Answer 1

How would you do it in RAM? You would use a circular buffer. Do the same thing on DynamoDB. Each time you write to the table, increment the primary key and modulo it 5000.