The IBM i does support the adjustment of time by way of speeding-up/slowing
down time incrementation, but that capability is NOT used for time changes
such as DST.

Time adjustment capability was added way back when with all the Y2K work.

On Fri, Nov 1, 2019 at 1:30 PM Rob Berendt <rob@xxxxxxxxx> wrote:

But is that REALLY how IBM does it?
At one time I thought IBM just brought the time to a crawl during these
fall back times. So as to avoid such an issue. Or maybe I am thinking NTP
corrections?

Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com


-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
Steinmetz, Paul via MIDRANGE-L
Sent: Friday, November 1, 2019 1:35 PM
To: 'midrange-l@xxxxxxxxxxxxxxxxxx' <midrange-l@xxxxxxxxxxxxxxxxxx>
Cc: Steinmetz, Paul <PSteinmetz@xxxxxxxxxx>
Subject: RE: Time change and the Advanced Job Scheduler

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I ran a test job in base job scheduler on a play ground LPAR, then set the
system time back several minutes, simulating the daylight savings time job.
The job will not run twice.
As Larry previously stated, the "next run time" is set for the job, so job
will only run once.

Word of caution.
If you have a batch job running across the time change, and that batch job
writes time stamps to db records, and the application relies on a date/time
order or the db is keyed by date/time, your application could run into
issues and/or end up with duplicate records.

Long story short, and best practice, avoid the 1 to 3 window.

Paul

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
Howie, Bill
Sent: Friday, November 01, 2019 11:46 AM
To: midrange-l@xxxxxxxxxxxxxxxxxx
Subject: Time change and the Advanced Job Scheduler

Hello again all,

I previously asked a question about the upcoming time change and how it
affects automated jobs in the Advanced Job Scheduler. I should have asked
this at the time but I wonder also about the default job scheduler (the
WRKJOBSCDE one). In the case of the WRKJOBSCDE one, we have a job that
runs at 1 am. Is it like the AJS in that it will run once and only once
and set it's scheduled next run date after it runs the first time? All
input appreciated! Thanks!

Bill Howie | Senior ERP Programmer/Analyst Consultant The HC Companies |
2450 Edison Blvd, Suite 3, Twinsburg OH 44087
Direct: 330.487.3739 | Cell: 330.495.5627 | Toll Free: 800.225.7712

The HC Companies, Inc.<http://www.hc-companies.com/> - North America's
Leading Provider of Containers for Horticulture Dillen | ITML | ProCal |
Kord | Amerikan | Planters' Pride From Grower to Gardener, Improving Our
World [Related image]<https://www.linkedin.com/company/the-hc-companies>
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