Major Storage Space Use After Moving Files

[Christoph Michelbach]

I had a suspicion that Deja Dup saves files again after they have been moved to a different location for some time. Since I now had to move my pictures and some documents, I tested it:

I made a backup via Deja Dup, looked how much storage space the backup takes by now, moved what I wanted to move to where I wanted to move it to, made another backup, and looked how much space it takes up now.

So I started out at 38.2 GB and the backup now uses 46.3 GB. The difference of 8.1 GB also is the size of the stuff I moved.

This behavior takes up a lot of storage space unnecessarily and could be avoided by identifying a file by its hash.

$ dpkg-query -W deja-dup duplicity
deja-dup 32.0-0ubuntu5
duplicity 0.7.01-1ubuntu1

[Kenneth Loafman (kenneth-loafman)]

There are no plans to add deduplication at the moment. It's on my list.