I'm using AWS-DMS to migrate existing data only from a Postgres db as source to aws-S3 as target. I have created a migration task for this, and I'm able to do the aforementioned.
However, I wanted to know how much time it took for a task to complete. I couldn't find a time completion metric in either the metrics corresponding to the task or the metrics corresponding to the replication-instance.
How do I find out the time taken for the full load?
Using the AWS CLI you can try using the describe-replication-tasks function.
This will provide you with both the Start and Stop times, as well as the time elapsed.