[0bfuscat3]

ZFS has the following that BTRFS doesn't * Deduplication - Huge in any virtualization environment * Cache layer - Required for high IOPS * fsck - BTRFS cannot fix itself * raid - BTRFS raid currently cannot repair itself and current git of the latest linux kernel still has these isses as well as space issues. I wouldn't trust BTRFS to store /dev/random

[gxti]

Good, because it's an experimental filesystem. Don't write it off completely though, because all of those (except for "cache layer" -- wtf does that even mean?) are planned.