today, I noticed during backup that docker 17.05 creates two very large files in
/var/lib/docker/devicemapper/devicemapper/ on Debian Stretch.
-rw------- 1 root root 100G Dez 8 22:50 data -rw------- 2 root root 2,0G Dez 7 01:22 metadata
My problem: My server has a 120 GB SSD and the / partition is
root@server:/# df -h / Dateisystem Größe Benutzt Verf. Verw% Eingehängt auf /dev/mapper/server--vg-root 71G 32G 37G 47% /
So how is that possible? And why? This files consumes huge amounts of my backup and I deleted it. Docker daemon won't start without it.
I have one single app running in docker: PlexMediaServer with this script: https://hub.docker.com/r/linuxserver/plex/
And yes there is a volume containing all my music and video files. But thats on the RAID, not on the system drive.
When restoring the file from backup, is takes hours and I'm pretty sure it will fill up my SSD completely and then stop.