Re: side-by-side upgrade

[Lukas Beeler <lukas.beeler@xxxxxxxxxxxxxxxx>]

On Tue, Nov 3, 2009 at 20:15, Mike Cunningham <mike.cunningham@xxxxxxx> wrote:
> Since the only thing that is going to change is our data could we safely do a save (option 21) and then just restore userprofiles and our libraries?

Depends on the applications you use.

I do 90% of my system migrations by migrating users and the libraries
of our applications, and reconfigure the rest of the system from
scratch (which takes about 10 minutes since it's mostly automated).

The reason for this is that full system-to-system migrations are
usually far to time-intensive, since most customers may be severely
lagging behind (e.G. be on a V5R1 system).

If you decide do work this way, you will _need_ to know and understand
how _everything_ works on your systems. But it's possible to fit a
switchover into a lunch hour - did that twice :)

The remaining 10% of our customers run custom applications, developed
by themselves or third parties. They usually have no clue on how their
systems works and are very afraid of hardware and operating system
upgrades.

> BP would like to blow away everything and start from installing V5R4M5 again, then a full restore and all the PFTs again. Looking to save that extra 6 hours of downtime.

I'd recommend you to go this route if you do not completely understand
how your applications interact with the system.