Well, I know that it may not be as widely known as ZFS, but I would recommend checking out NILFS2. It certainly seems interesting and seems like something that could solve many of the same problems ZFS sought to solve.

Thanks for the recommendation on adding in those links. I've added them. You'll find them at the end under "Further Reading and Sources". As well as a shout out to you. Cheers!

The zfsonlinux.org site is what I used to set this up. The pool version is reported as 28 and filesystem version as 5. My apologies there. My objective with this article was to create a simple to follow tutorial on how to get it set up. My objective never was on how to use ZFS or DTrace. I'm intermediately familiar with ZFS, and very much a beginner when it comes to DTrace. Again, a "how-to use" tutorial was not my objective. There are far better sources for documentation on use. My article is just to get people an environment set up in which to test the platform. I had been toying around with the idea of ZFS and DTrace on Linux for a while, however, there was nothing like my article to help people in setting up a testbed system. So, that's what I wrote once I figured out how to make it all work together.

I haven't done any performance testing so far. My objective with this was just as a proof of concept, if you will. I'm sure, if you are having kernel panics and absurdly slow IO/transfer speeds, the developers would welcome your input to make it better. Personally, I prefer LVM and ext4 for most uses. Again, this was more just to prove that it could be done.

The whole GPL/CDDL issue is still around, however, since the CDDL code is not added to the Linux Kernel, but instead a loadable kernel module distributed separately, it is possible to satisfy both the GPL of the Linux Kernel and the CDDL of ZFS and DTrace. Because of the incompatibility of CDDL with the GPL, you could not distribute a complete system using of Linux, ZFS, and DTrace. You can, however, distribute packages to allow people to build it themselves. This is what the authors of these projects have done.

Obviously, it would be a little less accessible, however, setting up and onion server for yourself would provide excellent anonymity. Though, I don't know of any host companies that could provide such a service. Seems it would defeat the purpose of and anonymity, but, if you were up for hosting yourself, it could work. Just google "the onion router" to look into it.