I'm currently exporting a ZFS partition with
netatalk. However, time-machine insists on creating a sparsebundle on it, and it made me start wondering if this would have any impact on deduplication, since the concept of "files" disappear, and probably the block alignment wouldn't be great either...
P.S. My whole idea of using dedup is that I have a couple of macbooks backing up to the same place, and a lot of their files are equal.
Addendum: It seems the block-level alignment is failing dedup. Here's my experience:
- Time-machine copies of two different macbooks, with lots of duplicated data among them (total 200Gb)
- CCC the two macbooks to two sparse images.
Deduplication factor? 1.01x
Any ideas on how to set up ZFS dedup to correctly work with time-machine backups? Should I start looking for other backup (w/ dedup) alternatives?