> If you really want ZFS, I would highly recommend looking into > FreeBSD (Postgresql works great on it) or if you want to stick with Linux, > look into mdadm with LVM or some other filesystem solution.
If you want to use ZFS because of its features, take a look at btrfs. It provides a lot of the stuff supported by ZFS with usually better performance on linux - and since the last few kernel revisions it is finally in a state where I would dare to use it in production.
If you need highest performance, don't use a copy-on-write filesystem like ZFS or btrfs, stick to ext4 or XFS ;)
Do you have any personal experience with BTRFS for a couple of weeks in production or any official statement/case study ? On the FAQ, it says it is still experimental (https://btrfs.wiki.kernel.org/index.php/FAQ), though it may just be outdated. There is also these two links that would make me very cautious (as I am with ZFS on Linux, mind you):