I've been bitten badly by btrfs before as well. I wish it were feasible to get CoreOS (and Docker, for that matter) to add support for ZFS. I use LXC + ZFS ev

I've been bitten badly by btrfs before as well. I wish it were feasible to get CoreOS (and Docker, for that matter) to add support for ZFS. I use LXC + ZFS every day and it is stable, reasonably fast, and all around wonderful!!! sigh.