Quote:
Originally Posted by
jlliagre
I'm missing why you rule out live upgrade, especially for a production system.
Directly upgrading the system not only would imply a long downtime period but also wouldn't allow to easily rollback to the previous Solaris release should something goes wrong.
There are reasons why not use LU especially in a production system. Sure it seems easier, but there are many issues that can arise during and after LU. Things like OS standards, security standards, audit/compliance standards, they will be affected by simply upgrading packages and leaving behind a slew of things that don't need to be there.
As for long downtimes, at work I just happen to be in that LU vs fresh install battle, me being on the engineering side waving the fresh install flag, SAs waving the LU is easier falg, and seeing the cases being opened when "something goes wrong" and LU doesn't "successfully upgrade", being asked for assistance to rebuild a server after 3-4 botched LUs, servers reporting the wrong compliance info to auditting SW because some arcane packages were left behind after LU, etc etc etc.
That's vs my method, which is a jumpstart DVD with a highly customized autobuild which includes everything but the actuall production apps, and takes about 20-30 minutes for a full fresh install.
