Allan Jude, a FreeBSD server administrator, is presenting at FOSDEM this weekend about "interesting things you can do with ZFS." His presentation covers ZFS features like data integrity checking, multi-level cache, copy-on-write behavior, snapshots, quotas, transparent compression, incremental replication, and more.
If you aren't able to attend FOSDEM 2016, he has uploaded his 31 page PDF slide deck for details on utilizing various ZFS features.
The presentation also mentions future OpenZFS features like resumable send, compressed ARC, new prefetch algorithms, more checksums, compressed send, fast file cloning, and more.
To learn more about ZFS for BSD or Linux systems, visit Open-ZFS.org or ZFSOnLinux.org.