Hi Frank,
We are still running on our tServer with FLEX-ES 6.x. and z/VM 4.4 and
z/VSE 3.1.2. We run the hardware on GMT
and use the z/VM system config file to recognize IPL's for daylight
savings. We do ours on Friday afternoon at 3:30 since
we don't have a shift running on either Sat or Sun.
This time we had a strange error where the FLEX console could not find
the VM IPL terminal. I think it is because we also
changed the UNIX time to adjust to the constant "drift" that we see
with the system time (FLEX/UNIX always ends up
running a minute or so fast over a few months). To compensate, we
changed our procedure to always do an INIT 6 on
the tServer after we change the clock for drift compensation.
Here is our system config:
/**********************************************************************/
/* TIMEZONE DEFINITIONS */
/**********************************************************************/
TimeZone_Definition CDT West 05.00.00
TimeZone_Definition CST West 06.00.00
TimeZone_Boundary on 2006-03-31 at 11:00:00 to CDT
TimeZone_Boundary on 2006-10-27 at 11:00:00 to CST
TimeZone_Boundary on 2007-03-09 at 11:00:00 to CDT
TimeZone_Boundary on 2007-11-02 at 11:00:00 to CST
TimeZone_Boundary on 2008-03-07 at 11:00:00 to CDT
TimeZone_Boundary on 2008-10-31 at 11:00:00 to CST
TimeZone_Boundary on 2009-03-06 at 11:00:00 to CDT
TimeZone_Boundary on 2009-10-30 at 11:00:00 to CST
TimeZone_Boundary on 2010-03-12 at 11:00:00 to CDT
TimeZone_Boundary on 2010-11-05 at 11:00:00 to CST
TimeZone_Boundary on 2011-03-11 at 11:00:00 to CDT
TimeZone_Boundary on 2011-11-04 at 11:00:00 to CST
TimeZone_Boundary on 2012-03-09 at 11:00:00 to CDT
TimeZone_Boundary on 2012-11-02 at 11:00:00 to CST
TimeZone_Boundary on 2013-03-08 at 11:00:00 to CDT
TimeZone_Boundary on 2013-11-01 at 11:00:00 to CST
Ed Zell
Illinois Mutual Life
(309) 636-0107
________________________________
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On
Behalf Of Frank M. Ramaekers
Sent: Friday, March 12, 2010 10:00 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Daylight Saving Time w/ VSE
This is the first time (in quite some time) that I've had a Daylight
Saving Time (Spring Forward). Last year we did a Fall Backward by
shutting the system down for one hour.
So, here are my questions:
1) VM time has to be done manually? Has anyone done this via
VMUTIL (for example?
2) Does anything need to be done to the z/VSEs (when springing
forward)?
3) Will z/VSE pick up the time change when it's changed on VM?
4) Are there special conditions for 2 and 3 above (specifically
SET CLOCK/ZONE/ZONEDEF/ZONEBDY settings)
Frank M. Ramaekers Jr.
Systems Programmer
MCP, MCP+I, MCSE & RHCE
American Income Life Insurance Co.
Phone: (254)761-6649
1200 Wooded Acres Dr.
Fax: (254)741-5777
Waco, Texas 76701
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