[ithkuil]

Actually there is a native ZFS port for linux: http://zfsonlinux.org/

The license doesn't allow to distribute a binary build of it, but you can build your own rpm and deb packages and install it to your own servers.

(According to their FAQ: "In a nutshell [...] This means that a single derived work of the Linux kernel and ZFS cannot be legally distributed."

Honestly, besides some quick tests I don't have any experience to judge how stable it is, but definitely better than the fragile fuse setup you are mentioning.

Anyone has more experience with it?