Re: Daylight Savings Time and NTP

[rob@xxxxxxxxx]

I thought prior to V5R3 syncing got into the hardware clock versus 
software clock debate.  Unless you purchased the fix from Consult Line to 
do this.  Or got iSeries Navigator configured to do this. I never could 
get the iSeries Navigator part to work.  Tried working with support line 
but they kept sending me over to Consult Line to purchase their package.

V5R3's syncing works good, with but a few concerns.  One is that it will 
only jump a little at a time.  So if you're suddenly an hour off if might 
take it quite some time to catch up.  And if your over a certain limit (3 
hours?) it won't even try.

V5R3 has a different support for the time change.

Couple of things from V5R3 Memo to Users (looks pretty prior to being 
pasted here):

SNTP client changes the system clock instead of the software clock In 
V5R3, the SNTP client changes the system clock instead of the software 
clock. If you want to have the software clock changed, or if you install 
V5R3 on a server that does not support system clock adjustment (iSeries 
models 7xx, 170, and 250), you must create a data area (*DTAARA) object 
named QTOTSNTP. Use the following CL command to create this data area 
object: CRTDTAARA DTAARA(QUSRSYS/QTOTSNTP) TYPE(*CHAR) LEN(9) 
VALUE(*SOFTWARE) AUT(*USE) To switch back to having the SNTP client change 
the system clock, run the following CL command to delete the data area 
object: DLTDTAARA DTAARA(QUSRSYS/QTOTSNTP)


QUTCOFFSET and QTIMZON system value changes In V5R3, changes to the 
QUTCOFFSET system value will not occur if the specified offset conflicts 
with the offset calculated by the server using the time zone description 
set in the QTIMZON system value. In a future release, the QUTCOFFSET 
system value will become a read-only system value. If you want to define 
the time zone for a server before you install V5R3, you should create a 
data area named QWCTIMZON in the QSYS library. The QWCTIMZON data area 
should be a character data area with a minimum length of 16 characters. 
The format is defined in the following way: v Byte 1: Sign for UTC offset 
(either â+â or â-â) v Bytes 2 and 3: Hours for UTC offset (00 to 12) v 
Byte 4: Time separator (ignored; included to improve readability of 
information in data area) v Bytes 5 and 6: Minutes for UTC offset (00 to 
59) v Bytes 7 through 16: Time zone description name, left justified and 
padded on the right with blanks.
Because the server automatically adjusts the local system clock for 
Daylight Saving Time support in V5R3, you should remove other mechanisms 
for changing the time, such as job schedule entries and system startup 
program logic, that you might have created in previous releases. For 
detailed information about time management, see the Time Management topic 
in the iSeries Information Center.

See also:
http://publib.boulder.ibm.com/infocenter/iseries/v5r3/ic2924/index.htm?info/rzati/rzatikickoff.htm


Rob Berendt
-- 
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





"Bill Hogue" <bhogue@xxxxxxxxx> 
Sent by: midrange-l-bounces@xxxxxxxxxxxx
10/28/2004 12:28 PM
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Subject
Daylight Savings Time and NTP






If our iSeries (v5r2) is syncing to a network time source (CHGNTPA),
will I still need to manually change for daylight savings time?   The
time source changes automatically.

Thanks,

Bill Hogue
Network Manager
Brattleboro Memorial Hospital


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