I speak about something as ZFS (Solaris) for functionalities but less heavy (in particular i like snapshots).

There are many different file systems:
Next-generation Linux file systems: NiLFS(2) and exofs

Linux Kernel 2.6.29 Includes the Btrfs Filesystem

Linux Kernel 2.6.30 Includes the NiLFS Filesystem

Which is the situation of Tux3?
I'm read is less heavy then Btrfs but even now isn't included on the kernel.

When will be available a stable file enterprise system on Linux?

Ceph merged on linux kernel 2.6.34
Ok this is more server centric.