Patching with Live Upgrade
From Peter Pap's Technowiki
Revision as of 02:01, 26 November 2010 by Ppapa (talk | contribs) (Created page with "So you have a critical system that needs patching, but you can't risk killing the box. Solaris uses "Live Upgrade" as a tool for altering a system, while maintaining the ability...")
So you have a critical system that needs patching, but you can't risk killing the box. Solaris uses "Live Upgrade" as a tool for altering a system, while maintaining the ability to rollback the change. This is ideal for patching a system, especially kernel patches and the like, as it means that you can apply you patches, try them out and rollback if it's failed. The method I describe here, assumes that the boot disks are mirrored. You can still use Live Upgrade in a non-mirrored environment, but I'm not going in to that here.
