We always over-provision any way, but with ZFS the overage is a requirement for any reasonable performance. With XFS, you can get away with 90-95% full; yes, th

We always over-provision any way, but with ZFS the overage is a requirement for any reasonable performance. With XFS, you can get away with 90-95% full; yes, there's degraded performance but nothing like the 10 IOPS you get from ZFS. Don't get me wrong I like ZFS/btrfs; I adore snapshot send/receive. It at times though really handicaps itself.