[pcwalton]

"Is it a bad thing that AIX and Solaris fell by the wayside in a rush to Linux? I don't think so."

Note that Solaris innovated with ZFS, which helped spur Linux to implement btrfs. Competition matters, even in OS kernels.

[DigitalJack]

I'm a little ignorant of the details here, but was ZFS a part of the Sun kernel?

I know the linux kernel is mostly monolithic, is the Solaris/openIndiana kernel the same?

Even if it is, it seems unlikely to me that the core kernel team had much to do with ZFS.

It's really more about competition between file systems, or so it seems to me. Maybe I'm splitting hairs.

[justincormack]

Yes it was part of the kernel. Sure it had a team dedicated to it but so does everything big.