How often Amazon DMS uploads Time Travel logs to S3
To minimize the storage usage of your replication instance, Amazon DMS offloads Time Travel logs from it periodically.
The Time travel logs get pushed to your Amazon S3 bucket in the cases following:
If the current size of logs exceeds 1 GB, Amazon DMS uploads the logs to S3 within five minutes. Thus, Amazon DMS can make up to 12 calls an hour to S3 and Amazon KMS for each running task.
Amazon DMS uploads the logs to S3 every hour, regardless of the size of the logs.
When a task is stopped, Amazon DMS immediately uploads the time travel logs to S3.