Quiescing the system is where the time is spent. Ok, Mimix has a command
called RUNSWTFWK. This is the one we modified to change the DNS and
everything else. I think this takes 8 minutes, tops.
However, when you add in quiescing you're now talking about a 43 minute
process.

Think of it like this.
SNDBRKMSG type process to everyone "Sign the heck off. System dies in 5
minutes. All should be well and running on the backup system in well
under an hour"
ENDSBS QINTER DLY(600)
...
...
...
No kidding. I have an intense check list with a bunch of "Write down
time_________" kind of stuff. Joblog is PDF'd and emailed to me.

We know that we could shave some time off of that. Cut it in half is very
doubtful.
I feel your concern. There is talk of moving the switch from 7pmET
(5pmMT-we have a large facility on that time zone) on Friday night to
maybe Saturday morning.
We would still have plenty of time most downtime weekends to do OS
upgrades (we upgraded several lpars this last weekend) and whatnot. We
might have to revert back to Friday for those rare unload/reload
situations.


Rob Berendt

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