This. Also the author do not mention that LLNL zfs Linux port is not as production ready than FreeBSD one. Personally I use nilfs2 on top of lvm since is Linu

This. Also the author do not mention that LLNL zfs Linux port is not as production ready than FreeBSD one. Personally I use nilfs2 on top of lvm since is Linux mainline from many many years, it a logfs like Hammer volumes, so it protect effectively against accidental overwrite/deletion and can be live resized both in grow and shrink so coupled with LVM can be a poor man's pooled storage... But Hammer on Linux will be a success like OpenSSH!