Cbbackup with diff not actually diffing in Community 5.5.1

Hello All,

As mentioned I am trying to establish a backup process using cbbackup and have done the full backup, but when I do a diff mode backup, the backup takes the same amount of time and backs up the entire contents of the cluster, not just the changes.

Here is the command that I am using (so you can see that I am using the same dest location):

cbbackup -m diff http://localhost:8091 /cbarchive/backups -u [username] -p [password]

Does anyone have any clues as to why this might be the case or where I can look to find out? I didn’t find any logs specific to the backup itself.