1. Download GlusterFS.2.0.0rc1.i86pc.Solaris.2.11.pkg.tgz to /tmp
2. tar xvf GlusterFS.2.0.0rc1.i86pc.Solaris.2.11.pkg.tgz in /tmp
3. pkgadd -d /tmp GlusterFS
4. 
$ pkginfo GlusterFS
system      GlusterFS GlusterFS 2.0.0rc1
$ which glusterfs
/usr/sfw/sbin/glusterfs
$ glusterfs --version
glusterfs 2.0.0rc1 built on Jan 16 2009 03:36:59
Repository revision: glusterfs--mainline--3.0--patch-844
Copyright (c) 2006, 2007, 2008 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General Public License.

Thats it you are done!