Question about cbbackup diff

I have started to play with different aspects of backup of a Couchbase server.

First I did a full backup using:

/opt/couchbase/bin/cbbackup couchbase:// /home/couchbase/backup -b data -u xxx -p yyy

Two days later I did a “diff” backup using:

/opt/couchbase/bin/cbbackup couchbase:// /home/couchbase/backup -b data -m diff -u xxx -p yyy

Now I can see that they take up equally much space on the disk. So to me the “diff” backup really looks like full backup:

I guess the idea of making a diff backup is to create a smaller backup set. So either I misunderstand the purpose of the “diff” backup of a Couchbase server - or I did it wrong :wink:

Any feedback much appreciated :+1:

I’m using: Community Edition 6.0.0