But what is it good for?

Posts tagged with: upgrade

The Key to Live Upgrade Success

I think one of the best features of Solaris is the Live Upgrade mechanism. This really useful feature can be used for upgrading and patching with very little impact on the server. This means you can patch or upgrade your production system, whilst it's still in production, and only schedule a short outage for the reboot needed to activate the new patched/upgraded environment. Live upgrade also has the added benefit that you can roll back to a known good boot environment in the event something goes wrong.Sadly, it's not always a bed of roses when it comes to using live upgrade as things change with patches and new bugs are discovered and fixed, however most problems can be easily avoided with a little bit of pre-planning.  Continue reading ►

ludelete of BE Holding GRUB on Solaris x86 Fixed

My little Ultra 20 under my desk runs with two boot environments and flip-flop between them as I upgrade using Live Upgrade. The basic procedure is: rename the old inactive BE (lurename), update it with the contents of the currently running BE (lumake), upgrade it to the latest and greatest (luupgrade), activate it (luactivate) and reboot.This is quite a pain free experience and has worked well for me. I never actually delete the alternate BE as I don't need the space. However, other people need to and ever since GRUB was introduced into Solaris 10 (x86 only) they encounter the following error when attempting to delete the BE that contains the GRUB menu:# ludelete -n snv_22ERROR: The boot environment contains the GRUB menu.ERROR: You are not allowed to delete this BE.Unable to delete boot environment.#This is a long standing issue (I've got a workaround if you want it) that has plagued many a sysadmin using Live Upgrade on Solaris 10 x86 and Nevada. Well, not any more.  Continue reading ►
Top