what happens to partitions when I reduce a dynamo tables throughput?

Question

Amazon's doc has nothing to say about this which makes me nervous.

It explains how partitions are created when I increase throughput and size, but what happens when I reduce throughput and size? Do I scale up and have a bunch of partitions and then scale down and STILL have a bunch of partitions?

This would be really bad because if I scale up a lot and then scale way down I would have many partitions sharing my read/write capacity.

Answer 1

Exactly as you thought. nothing happens. When reducing throughput, nothing happen to dynamodb partitions. If you get a situation were a bunch of partition created, the only way to "decrease" them back, is to do migration (create new table and copy data)