Check it out, this is very awesome news about OpenHA cluster in OpenSolaris.
A lot of people have had a problem with upgrading from OpenSolaris 111a to 111b /dev (or going to the /release) branch. When doing the image-update with IPS, you may get a similar error:
Of course, this is an old news. It was released yesterday. :) Just spreading the word. Check out the What's new in OpenSolaris 2009.06.
I am not going to go into a lot of technical details about this, but it'll show at least how we've used both ZFS and DTrace to solve a critical performance problem with one of our customers... with just a few commands!
ZFS does not need tuning. In fact, it is considered evil to do so. But, if you want to get the last little ounce of it or are in need of some super performance gains, have a look at this awesome blog on ZFS and InnoDB best practices.

