Thank you for your reply.
I also want to ask, if a new retention period is configured for a bucket, will the old shards change accordingly?
For instance, if the original expiration was 28 days, and old shards might have had an expiration of 1 day, when I change the period to 48 hours, the new shards should by default expire in 1 hour.
So, will the expiration time of the old shards that still contain data also change to 1 hour?