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Btrfs used to have really nasty behaviour on nearly-full drives. Has that been fixed?
by regularfry 8y ago
Btrfs used to have really nasty behaviour on nearly-full drives. Has that been fixed?
- unhammer 8y agoI've used it for backups for five years now. My USB backup drives have gotten full quite a lot of times because of old snapshots (rsync isn't able to detect moving directories), and I've had zero problems with it – just have to delete some old snapshots and wait a bit and then there's space again. I don't use RAID5, which is where I've heard btrfs is dangerous, just for the snapshots and dedupe (with https://github.com/jbruchon/jdupes/ https://github.com/jbruchon/jdupes/ )
- jstimpfle 8y agoIt was used at my old job on a 1TB backup drive, containing lots of hourly snapshots from around 100 other machines that also had btrfs on it (btrfs send). The snapshots were also frequently thinned (i.e. only a few of the older ones kept) to make room for new ones. The filesystem broke at least two times in two years when it was nearly full. None of the fixes we found with web searches worked. We went with formatting and copying the backups from another location, losing only a little bit of data that was not too important. That was around 2015-2017, and the version of Btrfs was about what's in Debian jessie.