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
# Links
http://wiki.ubuntuusers.de/Installieren_auf_Btrfs-Dateisystem
http://wiki.ubuntuusers.de/Befehle_Btrfs-Dateisystem