I have Duplicati - 22.214.171.124_beta_2017-08-01 (installed inside Asustor NAS ADM software) with destination B2 Cloud Storage.
I have completed the first backup; but then when it runs the consecutive backups (as part of the schedule); it takes as long as the original one runs?
The thing is, I have not made any changes to the source folders/files; I wonder why it takes a long time to run the consecutive backups
I was under impression that Duplicati will do an incremental backup by default?
When Duplicati runs it will only back up the parts (by default 100KB blocks) of files that have changed since the last run. Checking all those blocks for changes can take a while, especially when running on devices that might not have a lot of spare CPU or memory to put to the task.
I’d suggest looking at the job log and checking the first 10 or so lines of the Result entry where it lists the number and size of things like modified and added files.
If those numbers are high, you may just have lots of activity needing to be backed up every run. If they are low then Duplicati may just be running slowly for some reason.
Here’s an example from one of my recent test runs: