RE: BRMS and System i time changes -- MIDRANGE-L

So getting more specific on the systems I'm running this on - if I have
4 LPARs on a 570+, all at V5R3, all synchronized to same time server,
all at same time zone, all in BRMS network on TCP/IP - is the consensus
that they'd be ok for the time changes? 


--
Justin C. Haase - iSeries System Engineer
IBM Certified Systems Expert - System i
Kingland Systems Corporation

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Al Barsa
Sent: Tuesday, April 25, 2006 9:45 AM
To: Midrange Systems Technical Discussion
Subject: Re: BRMS and System i time changes

"Falling back" isn't as simple as it seems.  First of all it isn't
gradual (maybe it should have been, but it isn't  [Gradual time
adjustment was added in V5R3, but models 7xx, 170 and 250, all of which
can run V5R3 are incapable of this function.]).  This can cause some
applications to break, but I would be surprised if BRMS is one of them
as it is developed in Rochester, where I'm sure that all of the 5000
left hands know exactly what all of the 5000 right hands are
doing:-)))))  I do know that MQ Series and SAP had issues, but I am
unaware as to the extent of the problems.

I would point out that it is theoretically possible to have more trivial
problems when you "spring forward".  I wrote an application last week
that did a time prediction, and it dawned on me that it were running
during "spring ahead", the prediction would be inaccurate.  I assessed
the risk/reward/cost of adjusting my prediction, and I determined that
the "screw it" method made the most reasonable sense.

Al

Al Barsa, Jr.
Barsa Consulting Group, LLC

400>390

"i" comes before "p", "x" and "z"
e gads

Our system's had more names than Elizabeth Taylor!

914-251-1234
914-251-9406 fax

http://www.barsaconsulting.com
http://www.taatool.com
http://www.as400connection.com


 

             "Haase, Justin

             C."

             <justin.haase@Kin
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             midrange-l-bounce         <midrange-l@xxxxxxxxxxxx>

             s@xxxxxxxxxxxx
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Subject 
             04/24/2006 10:54          BRMS and System i time changes

             AM

 

 

             Please respond to

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Hi all,

In chapter 14 of the BRMS V5R3 manual, it states that changing time on
systems in a network is pretty touchy and should be handled with care.
How does BRMS handle the automatic time changes with V5R3 and the newer
hardware platforms which change the time automatically?  Assume all the
systems are synchronized to the same time server and are in the same
time zone.

Logically, I'd think that BRMS wouldn't care, because the time change,
especially fall back is slowly implemented, not just snapped backward -
the time in fact never reverses.  Thoughts?


--
Justin C. Haase - iSeries System Engineer IBM Certified Systems Expert -
System i Kingland Systems Corporation


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