"Generally I do like load and run Temp and SAVE 22. Run for perhaps 2 or
3 months. Then perm apply all and SAVE 22. Then repeat as necessary."
This brings up a question I have and am interested in what others do.
Currently immediately before applying a new CUME I apply the 5770999 PTFs
permanently. Someone asked if maybe we should apply all PTFs permanently
prior to applying a CUME. Is there a reason to apply all other than having
a base level of PTFs?
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Sent: Thursday, June 05, 2014 5:05 AM
To: Midrange Systems Technical Discussion
Subject: Re: PTF apply philosophyies
I do a LOT of PTFs and spoken to many of the fine folks at IBM re PTFs and
First off it has been stated that MANY PTFs simply require an IPL. The
objects being replaced simply cannot be updated at any other time as they
are always in use or otherwise locked. A claim of 90% of PTFs can be
applied immediately doesn't align with what I see. I suppose it's possible
in fact but with all the pre and co requisite PTFs all it takes is one PTF
in the 'set' to require an IPL and the other PTFs are stuck so effectively
all the PTFs require an IPL.
I have heard several times that using *IMMDLY (Immediate if possible,
Delayed to IPL when mandatory) Is NOT recommended for any PTF Groups
including CUMEs. It's essentially impossible to read every cover letter and
deal with all the special instructions. Failure to follow the special
instructions can mean many things, not the least of which is that many of
the PTFs that APPEAR to be applied are not active until an action is taken,
frequently the action is to IPL (which I find annoying!)
I do concur with other comments that if you are not provided sufficient
time for backups, PTFs, and other maintenance then having an HA system is
near mandatory. Clearly NOT doing PTFs and proper saves is just a system
crash looking for a bad time to occur. If time is so short when you DO get
a window that any problems push you into being considered an outage that
also is 'living on the edge'. Also consider making your load source disk
an SSD, this will 'enhance PTF apply performance.'
Generally I do like load and run Temp and SAVE 22. Run for perhaps 2 or
3 months. Then perm apply all and SAVE 22. Then repeat as necessary.
- Larry "DrFranken" Bolhuis
On 6/4/2014 11:56 AM, Steinmetz, Paul wrote:
Management would like to minimize the IPL, PTF, and system save
HA/DR Is out of the question.with a system save.
Currently, I try to IPL Production every 2 months for PTF apply along
The IPL and system save will probably go to 6 months or as needed.not recommend immediate apply for more than a single PTF.
90% of PTFs can be applied immediately without an IPL, however IBM does
Applying a large amount of PTFs immediately has caused issues in thepast.
Permission has been granted for the PTF immediate apply, but I'm wearyfrom previous issues.
Any thoughts from the group.
IBM i Systems Administrator
Pencor Services, Inc.
462 Delaware Ave
Palmerton Pa 18071
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