btrfs

sudo apt-get install btrfs-tools
# mkfs.btrfs /dev/sdb
sudo mkfs.btrfs -L lxc /dev/sdb1
 
# list volumes
btrfs filesystem show
 
# list subvolumes
mount /dev/sdb1 /mnt/
btrfs subvolume list /mnt/
 
# create subvolume
sudo btrfs subvolume create /mnt/@sub1
 
# get default subvolume
btrfs subvolume get-default /mnt/
 
# set default subvolume
btrfs subvolume set-default 299 /mnt/
 
# mount subvolume
mount -o subvol=new_subvol /dev/sdb1 /tmp/2
 
btrfs filesystem resize 64g /mnt
 
# enable comprsssion (mountparameter)
compress
 
# /etc/fstab
/dev/sda        /       btrfs   rw,autodefrag,compress=lzo,noatime,thread_pool=16       00
 
# directroy to subvolume?
# mv /var/lib/lxc/installserver /var/lib/lxc/installserver_tmp
# btrfs subvol create /var/lib/lxc/installserver
# time cp -a --reflink /var/lib/lxc/installserver_tmp/rootfs /var/lib/lxc/installserver
 
# create snapshot
sudo btrfs subvolume snapshot / /@snap1
 
# list snapshots
btrfs subvolume list /
 
# delete snapshot
btrfs subvolume delete /@snap1