ZFS has many advantages over traditional Linux filesystems such as ext4 – when it came time to expand /home in a Virtualbox VM, using ZFS was easier than expanding disk allocation and repartitioning. I didn’t even need to reboot! It also helps to future-proof additional filesystem expansion, provides fast+efficient compression and Samba+NFS file sharing.
How to install Ubuntu 14.04 and ZFS on Linux:
How to move your Linux /home to ZFS on Linux:
( Disclaimer: I am the author of these articles )