“Eventually we will see Ubuntu Linux deploy Btrfs as the default
file-system. While we will likely not see the switch from EXT4 to
Btrfs with Ubuntu 11.10, there is work underway on Btrfs
integration support into Ubuntu’s Update Manager.
“With Fedora 13, Red Hat introduced system roll-back support
whereby anytime a yum transaction takes place for installing a new
RPM package on a Btrfs root file-system, a snapshot will be