I have four drives of ZFS raidz data (12TB) on a HP Microserver (Dual-Core Processor, AMD Turion II Processor Model Neo N54L (2.20 GHz, 15W, 2MB) ) with 16GB of DDR3 RAM. I found this out using my ventory USB drive. Had to add zfs once I booted ubuntu.
My use case will be to serve files using ksmbd inside home. So, I wonder if a X86 version of OpenWrt would support ZFS. Again my use case is just a filer.
I think i will make a pupply linux flash usb with zfs. This is likely a fuse but my application is not high performance. I wonder if btrfs is there in openwrt then why not zfs.