On 01/28/13 21:27, James A. Peltier wrote: > ----- 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. > > 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 > It does sound like you can do the roughly the same with LVM snapshots. Reading the introduction of the solaris document you linked; it seems as if the solaris upgrade is applied on say a snapshot; and then the system is rebooted into the upgraded environment; and if it works, great, if not you need a reboot back into the original state. Wheras with CentOS 6; you take a snapshot of the root partition (easy as "lvcreate --snapshot --name RootSnapshot --size 2G /dev/VolGroup/Root"), and then do an upgrade with a reboot. If it works; you're set, if not, just revert back to the snapshot (lvconvert --merge VolGroup/RootSnapshot) and reboot; you'd be back to the state before the upgrade. -xrx