Исправление deadNightTiger, (текущая версия) :
У докера куча бэкендов: OverlayFS, AUFS, Btrfs, Device Mapper, VFS, ZFS. Например, в федоре:
Storage Driver: devicemapper
Pool Name: docker-253:0-659420-pool
Pool Blocksize: 65.54 kB
Base Device Size: 107.4 GB
Backing Filesystem: xfs
Data file: /dev/loop0
Metadata file: /dev/loop1
Data Space Used: 53.74 MB
Data Space Total: 107.4 GB
Data Space Available: 44.55 GB
Metadata Space Used: 606.2 kB
Metadata Space Total: 2.147 GB
Metadata Space Available: 2.147 GB
Udev Sync Supported: true
Deferred Removal Enabled: false
Deferred Deletion Enabled: false
Deferred Deleted Device Count: 0
Data loop file: /var/lib/docker/devicemapper/devicemapper/data
Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
Library Version: 1.02.109 (2015-09-22)
Исходная версия deadNightTiger, :
У докера куча бэкендов: OverlayFS, AUFS, Btrfs, Device Mapper, VFS, ZFS.