Typically murders mail order wives and makes shitty defenses in court then gets beaten up badly in prison. Also, even if Hans Reiser didn't murder anyone, the kernel people NEVER liked him. We would have never seen Reiser4 becoming mainstream anyway, despite the fact that ReiserFS was so damn popular. I have a hunch, if it was developed more, it would be far ahead of any Linux filesystem speedwise (for desktop loads at least.)
From what I've been able to gather he wanted to do several things that just didn't work/ broke compatibility with the traditional Linux and UNIX filesystems.
Most distributions do not have first party support yet, although the number has been increasing. 5 distributions have first party support as of this year. That is up from 0 last year.
I got fed up with FreeBSD and support for certain SATA controllers, so I whopped the OS from the disk yesterday and put Gentoo on it.
1. The Gentoo LiveCD 12.1 with ZFSOnLinux opened my existing pools without problems (once created with FreeBSD)
2. install went fine (I didn't use ZFS as rootfs but ext4)
3. all pools are available during boot and much better HW support with 3.4 Linux kernel
Well guys in my opinion I have to say that I am impressed of the way a filesystem out of the kernel tree, maintained for years only by one person in his free time beats out the GREAT NEW btrfs at many tests and the only test showed significant weakness was the multi threaded IO tester which may indicate just a bug that is missed from the hobbyist maintainer it has.
Also it shows significant performance upgrade from the classic ReiserFS and it is very significant that sometimes it beats out all other FSes!
For me it deserves to enter the mainline tree as well as getting more attention by developers. I used to use ReiserFS in the past at SuSE distros and it never let me down back then.
My comments about all tested FSes:
-EXT4: The most complete package for now.
-Btrfs: Much more said, much less we see in action.
-XFS: Still on the podium!
-Reiser4 : An unexpected good performer!
I am sorry Michael but I have to disagree with you at the conclusion of the article about Btrfs and Reiser4.
Btrfs still has not proved itself all those years being in heavy development furthermore in the way it is advertized as an FS for SSDs. Its grandpa XFS many times proves to be faster on both SSDs and HDDs.
Reiser4 on the other hand was an unknown quantity but today we took a taste of its performance and was not bad at all!