Getting to Know ZFS on Linux
Most times your workstation file system is just ext4 and that's fine. Most servers can do fine with that as well. If you want snapshots, block-level replication and flexible volume partitioning, you should consider ZFS. I'll cover how to set up, typical snapshot usage, and how to grow the file system. Plus: your questions!
Short Link: http://lfnw.org/node/3968