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I am not surprised to see them cover every major filesystem option except ZFS. Oracle does not like to talk about OpenZFS. Not to mention, they could say that they were only testing in-tree file systems.

My understanding is that Oracle's linux devs were behind btrfs before the Sun takeover and thus are boosting that, and also Oracle's lawyers are highly litigious on licensing issues, so they probably view ZFS on Linux like lions circling a carcass.

Close!

Chris Mason wrote btrfs when he started at Oracle (not Sun):

http://www.linuxfoundation.org/news-media/blogs/browse/2009/...

Conversely, it seems that btrfs lasts only 5s before hitting an issue so I wonder this will drive improvements in that area and how this might affect NASs that use btrfs like Synology.

> and yet not a single word about ZFS?

ZFS is not included in the Linux kernel. Much of this work was about building the infrastructure to be able to perform this kind of test.

Trying to do it for file systems that aren't included in Linux is a lot of effort for much less gain.