CentOS - Jan 2013 - Anything Like Solaris' Live Upgrade?

Does anyone know of any sort of Linux utility that does something like 
what Solaris' Live Upgrade 
(http://docs.oracle.com/cd/E19455-01/806-7933/index.html) does?

In my past life as a Solaris sys-admin, I found this an extremely useful 
tool for upgrading and patching running systems, as well as for 
maintaining redundant boot environments on separate system disks for 
disaster situations.
-- 
Tim Evans			|   5 Chestnut Court
Linux/UNIX Consulting		|   Owings Mills, MD 21117
http://www.tkevans.com/		|   443-394-3864
http://www.come-here.com/News/	|   tkevans at tkevans.com

----- Original Message -----
| Does anyone know of any sort of Linux utility that does something
| like
| what Solaris' Live Upgrade
| (http://docs.oracle.com/cd/E19455-01/806-7933/index.html) does?
| 
| In my past life as a Solaris sys-admin, I found this an extremely
| useful
| tool for upgrading and patching running systems, as well as for
| maintaining redundant boot environments on separate system disks for
| disaster situations.
| --
| Tim Evans			|   5 Chestnut Court
| Linux/UNIX Consulting		|   Owings Mills, MD 21117
| http://www.tkevans.com/		|   443-394-3864
| http://www.come-here.com/News/	|   tkevans at tkevans.com

Nothing really until BTRFS comes of age.  I suppose you could snapshot your LVM
volumes before performing the upgrade but to my knowledge there is nothing
similar to Live Upgrade for CentOS

-- 
James A. Peltier
Manager, IT Services - Research Computing Group
Simon Fraser University - Burnaby Campus
Phone   : 778-782-6573
Fax     : 778-782-3045
E-Mail  : jpeltier at sfu.ca
Website : http://www.sfu.ca/itservices