This is a `community port' of Oracle's ZFS. In the meanwhile, Oracle is developing btrfs as the next-gen Linux filesystem, which does, as far as I understand it, pretty much the same things as ZFS, except that it's GPL instead of CDDL. btrfs is also considered unstable even after almost 6 years of development.
So, why is Oracle developing btrfs? `Not invented here'? That seems strange, since both filesystems originate at Sun/Oracle. Licence issue? That also seems strange for the same reasons ...
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UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things.
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